, W3Schools is optimized for learning and training. The try/catch/finally statement handles some or all of the errors that may occur in a block of code, while still running code.
It always executes, regardless of whether an exception was thrown or caught.
You can also use the try statement to handle JavaScript exceptions. TypeError: Reduce of empty array with no initial value, TypeError: X.prototype.y called on incompatible type, TypeError: can't access property "x" of "y", TypeError: can't assign to property "x" on "y": not an object, TypeError: can't define property "x": "obj" is not extensible, TypeError: can't delete non-configurable array element, TypeError: can't redefine non-configurable property "x", TypeError: cannot use 'in' operator to search for 'x' in 'y', TypeError: invalid 'instanceof' operand 'x', TypeError: invalid Array.prototype.sort argument, TypeError: invalid assignment to const "x", TypeError: property "x" is non-configurable and can't be deleted, TypeError: setting getter-only property "x", TypeError: variable "x" redeclares argument, Warning: -file- is being assigned a //# sourceMappingURL, but already has one, Warning: 08/09 is not a legal ECMA-262 octal constant, Warning: Date.prototype.toLocaleFormat is deprecated, Warning: JavaScript 1.6's for-each-in loops are deprecated, Warning: String.x is deprecated; use String.prototype.x instead, Warning: expression closures are deprecated, Warning: unreachable code after return statement, Enumerability and ownership of properties. operator, SyntaxError: missing } after function body, SyntaxError: missing } after property list, SyntaxError: redeclaration of formal parameter "x".
The error object provides two useful properties: name and message. This includes exceptions thrown inside of the catch-block: The outer "oops" is not thrown because of the return in the finally-block.
Errors can be coding errors made by the programmer, errors due to wrong
block). You can create "Conditional catch-blocks" by combining try...catch blocks with if...else if...else structures, like this: A common use case for this is to only catch (and silence) a small subset of expected errors, and then re-throw the error in other cases: When an exception is thrown in the try-block, exception_var (i.e., the e in catch (e)) holds the exception value. 500. catch, you can control program
JavaScript hatalarını try ve catch ile hataları kontrol edebiliriz. This identifier is only available in the catch-block's scope. The technical term for this is: JavaScript will throw an
handle it. catch, regardless of the result: JavaScript has a built in error object that provides error information when
If the value is wrong,
If no error occurs, this block of code is never executed, Optional. If an inner try statement does not have a catch-block, the enclosing try statement's catch-block is used instead. Now, if we already caught the exception in the inner try-block by adding a catch-block. Any given exception will be caught only once by the nearest enclosing catch-block unless it is rethrown. A ReferenceError is thrown if you use (reference) a variable
input, and other unforeseeable things.
The JavaS… Different web browsers may add more property to the error object.
for errors. If you'd like to contribute to the interactive examples project, please clone, The compatibility table on this page is generated from structured data. after try and catch, regardless of the result. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
They will not work in all browsers. In this example, we have made a typo in the code (in the try
SyntaxError: test for equality (==) mistyped as assignment (=)? The finally-block contains statements to execute after the try-block and catch-block(s) execute, but before the statements following the try...catch...finally-block. JavaScript catch anahtar kelimesi çalışma zaman hatası sonucu oluşan hataları ekrana yazdırmak için kullanılır. Daha sonra program finally bloğu ile yukarıda açıklandığı biçimde çalışmaya devam eder. syntax error. The source for this interactive example is stored in a GitHub repository.
be executed, if an error occurs in the try block.
Use SyntaxError instead. Content is available under these licenses. Newer versions of JavaScript do not throw EvalError.
The exception (err) is caught by the catch statement and a custom error message is displayed: The finally statement lets you execute code, after try and
Block of code to be executed regardless of the try / catch result.
JavaScript catches adddlert as an error, and executes the catch code to handle it. come in pairs: When an error occurs, JavaScript will
This gives us three forms for the trystatement: 1. try...catch 2. try...finally 3. try...catch...finally A catch-block contains statements that specify what to do if an exception is thrown in the try-block. Note that the finally-block executes regardless of whether an exception is thrown. If any statement within the try-block (or in a function called from within the try-block) throws an exception, control is immediately shifted to the catch-block. number (Microsoft).
Errors can be coding errors made by the programmer, errors due to wrong input, and other unforeseeable things. A RangeError is thrown if you use a number that is outside
be executed, if an error occurs in the try block. See the JavaScript Guide for more information on JavaScript exceptions.
The try statement consists of a try-block, which contains one or more statements. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: W3Schools is optimized for learning and training. This example examines input.
The try...catch statement marks a block of statements to try and specifies a response should an exception be thrown. You can catch programmer-generated and runtime exceptions, but you cannot catch JavaScript syntax errors. stack (Mozilla)
For example, Firefox adds file… range of expected types: A URIError is thrown if you use illegal characters in a URI function: Mozilla and Microsoft defines some non-standard error object properties: fileName (Mozilla)
If you use throw together with
At least one catch-block, or a finally-block, must be present. input, and other unforeseeable things. If an error occurs, JavaScript terminates the code execution and jumps to the catchblock. Tip: When an error occurs, JavaScript will normally stop, and generate an error
The example is supposed to alert "Welcome guest! While using W3Schools, you agree to have read and accepted our, Required.
Note: The catch and finally statements are both optional,
The finally statement lets you execute code,
A TypeError is thrown if you use a value that is outside the
The catch statement lets you handle the error. try catch. but you need to use one of them (if not both) while using the try statement. catch, regardless of the result: JavaScript Reference: JavaScript throw Statement. JavaScript Error Reference. Introduction to JavaScript Try Catch. an error occurs. lineNumber (Mozilla)
Also, if an exception is thrown, the statements in the finally-block execute even if no catch-block handles the exception. Specifies a local variable that refers to the error. The throw statement allows you to create a custom error.
The exception (err) is caught by the catch statement and a custom error message is displayed: Modern browsers will often use a combination of JavaScript and built-in HTML
Execution of the current function will stop (the statements after throw won't be executed), and control will be passed to the first catch block in the call stack.
If you haven’t already created an account, you will be prompted to do so after signing in. Examples might be simplified to improve reading and learning. The finally-block will always execute after the try-block and catch-block(s) have finished executing. Do not use these properties in public web sites. While using W3Schools, you agree to have read and accepted our, Sets or returns an error message (a string), An error has occurred in the eval() function. {} must always be used, even for single statements. to create a custom error (throw an exception). If you don't need the exception value, it could be omitted. To handle errors in JavaScript, you use the try...catchstatement: In this statement, you place the code that may cause errors in the try block and the code that handles the error in the catchblock. Block of code to be tested for errors while it is being executed, Required if used with catch. You can use this identifier to get information about the exception that was thrown. The try statement allows you to define a block of code to be
description (Microsoft)
When a catch-block is used, the catch-block is executed when any exception is thrown from within the try-block. The catch-block specifies an identifier (e in the example above) that holds the value of the exception; this value is only available in the scope of the catch-block. The variable can refer to the Error object (contains information about the occurred error, like the message "'addlert' is not defined").
JavaScript Errors Tutorial. Technically you can throw an exception (throw an error). The try statement is used to define a block of code to be tested for errors while it is being executed.
The try statement allows you to define a block of code to be
The catch statement allows you to define a block of code to
columnNumber (Mozilla)
Use the throw statement
tested for errors while it is being executed. Get the latest and greatest from MDN delivered straight to your inbox.
The following example shows one use case for the finally-block.
The latest versions of JavaScript added exception handling capabilities. JavaScript try and catch The try statement allows you to define a block of code to be tested for errors while it … errors. The difference becomes obvious when we look at the code inside a function. If the value is wrong,
Of course, any new exceptions raised in the "inner" block (because the code in catch-block may do something that throws), will be caught by the "outer" block. If you'd like to contribute to the data, please check out, https://github.com/mdn/interactive-examples, https://github.com/mdn/browser-compat-data, Error: Permission denied to access property "x", RangeError: argument is not a valid code point, RangeError: repeat count must be less than infinity, RangeError: repeat count must be non-negative, ReferenceError: assignment to undeclared variable "x", ReferenceError: can't access lexical declaration`X' before initialization, ReferenceError: deprecated caller or arguments usage, ReferenceError: invalid assignment left-hand side, ReferenceError: reference to undefined property "x", SyntaxError: "0"-prefixed octal literals and octal escape seq. At least one catch-block, or a finally-block, must be present.
It always executes, regardless of whether an exception was thrown or caught.
You can also use the try statement to handle JavaScript exceptions. TypeError: Reduce of empty array with no initial value, TypeError: X.prototype.y called on incompatible type, TypeError: can't access property "x" of "y", TypeError: can't assign to property "x" on "y": not an object, TypeError: can't define property "x": "obj" is not extensible, TypeError: can't delete non-configurable array element, TypeError: can't redefine non-configurable property "x", TypeError: cannot use 'in' operator to search for 'x' in 'y', TypeError: invalid 'instanceof' operand 'x', TypeError: invalid Array.prototype.sort argument, TypeError: invalid assignment to const "x", TypeError: property "x" is non-configurable and can't be deleted, TypeError: setting getter-only property "x", TypeError: variable "x" redeclares argument, Warning: -file- is being assigned a //# sourceMappingURL, but already has one, Warning: 08/09 is not a legal ECMA-262 octal constant, Warning: Date.prototype.toLocaleFormat is deprecated, Warning: JavaScript 1.6's for-each-in loops are deprecated, Warning: String.x is deprecated; use String.prototype.x instead, Warning: expression closures are deprecated, Warning: unreachable code after return statement, Enumerability and ownership of properties. operator, SyntaxError: missing } after function body, SyntaxError: missing } after property list, SyntaxError: redeclaration of formal parameter "x".
The error object provides two useful properties: name and message. This includes exceptions thrown inside of the catch-block: The outer "oops" is not thrown because of the return in the finally-block.
Errors can be coding errors made by the programmer, errors due to wrong
block). You can create "Conditional catch-blocks" by combining try...catch blocks with if...else if...else structures, like this: A common use case for this is to only catch (and silence) a small subset of expected errors, and then re-throw the error in other cases: When an exception is thrown in the try-block, exception_var (i.e., the e in catch (e)) holds the exception value. 500. catch, you can control program
JavaScript hatalarını try ve catch ile hataları kontrol edebiliriz. This identifier is only available in the catch-block's scope. The technical term for this is: JavaScript will throw an
handle it. catch, regardless of the result: JavaScript has a built in error object that provides error information when
If the value is wrong,
If no error occurs, this block of code is never executed, Optional. If an inner try statement does not have a catch-block, the enclosing try statement's catch-block is used instead. Now, if we already caught the exception in the inner try-block by adding a catch-block. Any given exception will be caught only once by the nearest enclosing catch-block unless it is rethrown. A ReferenceError is thrown if you use (reference) a variable
input, and other unforeseeable things.
The JavaS… Different web browsers may add more property to the error object.
for errors. If you'd like to contribute to the interactive examples project, please clone, The compatibility table on this page is generated from structured data. after try and catch, regardless of the result. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
They will not work in all browsers. In this example, we have made a typo in the code (in the try
SyntaxError: test for equality (==) mistyped as assignment (=)? The finally-block contains statements to execute after the try-block and catch-block(s) execute, but before the statements following the try...catch...finally-block. JavaScript catch anahtar kelimesi çalışma zaman hatası sonucu oluşan hataları ekrana yazdırmak için kullanılır. Daha sonra program finally bloğu ile yukarıda açıklandığı biçimde çalışmaya devam eder. syntax error. The source for this interactive example is stored in a GitHub repository.
be executed, if an error occurs in the try block.
Use SyntaxError instead. Content is available under these licenses. Newer versions of JavaScript do not throw EvalError.
The exception (err) is caught by the catch statement and a custom error message is displayed: The finally statement lets you execute code, after try and
Block of code to be executed regardless of the try / catch result.
JavaScript catches adddlert as an error, and executes the catch code to handle it. come in pairs: When an error occurs, JavaScript will
This gives us three forms for the trystatement: 1. try...catch 2. try...finally 3. try...catch...finally A catch-block contains statements that specify what to do if an exception is thrown in the try-block. Note that the finally-block executes regardless of whether an exception is thrown. If any statement within the try-block (or in a function called from within the try-block) throws an exception, control is immediately shifted to the catch-block. number (Microsoft).
Errors can be coding errors made by the programmer, errors due to wrong input, and other unforeseeable things. A RangeError is thrown if you use a number that is outside
be executed, if an error occurs in the try block. See the JavaScript Guide for more information on JavaScript exceptions.
The try statement consists of a try-block, which contains one or more statements. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: W3Schools is optimized for learning and training. This example examines input.
The try...catch statement marks a block of statements to try and specifies a response should an exception be thrown. You can catch programmer-generated and runtime exceptions, but you cannot catch JavaScript syntax errors. stack (Mozilla)
For example, Firefox adds file… range of expected types: A URIError is thrown if you use illegal characters in a URI function: Mozilla and Microsoft defines some non-standard error object properties: fileName (Mozilla)
If you use throw together with
At least one catch-block, or a finally-block, must be present. input, and other unforeseeable things. If an error occurs, JavaScript terminates the code execution and jumps to the catchblock. Tip: When an error occurs, JavaScript will normally stop, and generate an error
The example is supposed to alert "Welcome guest! While using W3Schools, you agree to have read and accepted our, Required.
Note: The catch and finally statements are both optional,
The finally statement lets you execute code,
A TypeError is thrown if you use a value that is outside the
The catch statement lets you handle the error. try catch. but you need to use one of them (if not both) while using the try statement. catch, regardless of the result: JavaScript Reference: JavaScript throw Statement. JavaScript Error Reference. Introduction to JavaScript Try Catch. an error occurs. lineNumber (Mozilla)
Also, if an exception is thrown, the statements in the finally-block execute even if no catch-block handles the exception. Specifies a local variable that refers to the error. The throw statement allows you to create a custom error.
The exception (err) is caught by the catch statement and a custom error message is displayed: Modern browsers will often use a combination of JavaScript and built-in HTML
Execution of the current function will stop (the statements after throw won't be executed), and control will be passed to the first catch block in the call stack.
If you haven’t already created an account, you will be prompted to do so after signing in. Examples might be simplified to improve reading and learning. The finally-block will always execute after the try-block and catch-block(s) have finished executing. Do not use these properties in public web sites. While using W3Schools, you agree to have read and accepted our, Sets or returns an error message (a string), An error has occurred in the eval() function. {} must always be used, even for single statements. to create a custom error (throw an exception). If you don't need the exception value, it could be omitted. To handle errors in JavaScript, you use the try...catchstatement: In this statement, you place the code that may cause errors in the try block and the code that handles the error in the catchblock. Block of code to be tested for errors while it is being executed, Required if used with catch. You can use this identifier to get information about the exception that was thrown. The try statement allows you to define a block of code to be
description (Microsoft)
When a catch-block is used, the catch-block is executed when any exception is thrown from within the try-block. The catch-block specifies an identifier (e in the example above) that holds the value of the exception; this value is only available in the scope of the catch-block. The variable can refer to the Error object (contains information about the occurred error, like the message "'addlert' is not defined").
JavaScript Errors Tutorial. Technically you can throw an exception (throw an error). The try statement is used to define a block of code to be tested for errors while it is being executed.
The try statement allows you to define a block of code to be
The catch statement allows you to define a block of code to
columnNumber (Mozilla)
Use the throw statement
tested for errors while it is being executed. Get the latest and greatest from MDN delivered straight to your inbox.
The following example shows one use case for the finally-block.
The latest versions of JavaScript added exception handling capabilities. JavaScript try and catch The try statement allows you to define a block of code to be tested for errors while it … errors. The difference becomes obvious when we look at the code inside a function. If the value is wrong,
Of course, any new exceptions raised in the "inner" block (because the code in catch-block may do something that throws), will be caught by the "outer" block. If you'd like to contribute to the data, please check out, https://github.com/mdn/interactive-examples, https://github.com/mdn/browser-compat-data, Error: Permission denied to access property "x", RangeError: argument is not a valid code point, RangeError: repeat count must be less than infinity, RangeError: repeat count must be non-negative, ReferenceError: assignment to undeclared variable "x", ReferenceError: can't access lexical declaration`X' before initialization, ReferenceError: deprecated caller or arguments usage, ReferenceError: invalid assignment left-hand side, ReferenceError: reference to undefined property "x", SyntaxError: "0"-prefixed octal literals and octal escape seq. At least one catch-block, or a finally-block, must be present.
Posted in Uncategorized by on October 20, 2020 @ 11:53 am
Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
an exception (err) is thrown. The newsletter is offered in English only at the moment. For example, when the exception occurs in the following code, control transfers to the catch-block. Whereas, the catch statement is used to define a block of code to be executed if an error occurs in the try block. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: , W3Schools is optimized for learning and training. The try/catch/finally statement handles some or all of the errors that may occur in a block of code, while still running code.
It always executes, regardless of whether an exception was thrown or caught.
You can also use the try statement to handle JavaScript exceptions. TypeError: Reduce of empty array with no initial value, TypeError: X.prototype.y called on incompatible type, TypeError: can't access property "x" of "y", TypeError: can't assign to property "x" on "y": not an object, TypeError: can't define property "x": "obj" is not extensible, TypeError: can't delete non-configurable array element, TypeError: can't redefine non-configurable property "x", TypeError: cannot use 'in' operator to search for 'x' in 'y', TypeError: invalid 'instanceof' operand 'x', TypeError: invalid Array.prototype.sort argument, TypeError: invalid assignment to const "x", TypeError: property "x" is non-configurable and can't be deleted, TypeError: setting getter-only property "x", TypeError: variable "x" redeclares argument, Warning: -file- is being assigned a //# sourceMappingURL, but already has one, Warning: 08/09 is not a legal ECMA-262 octal constant, Warning: Date.prototype.toLocaleFormat is deprecated, Warning: JavaScript 1.6's for-each-in loops are deprecated, Warning: String.x is deprecated; use String.prototype.x instead, Warning: expression closures are deprecated, Warning: unreachable code after return statement, Enumerability and ownership of properties. operator, SyntaxError: missing } after function body, SyntaxError: missing } after property list, SyntaxError: redeclaration of formal parameter "x".
The error object provides two useful properties: name and message. This includes exceptions thrown inside of the catch-block: The outer "oops" is not thrown because of the return in the finally-block.
Errors can be coding errors made by the programmer, errors due to wrong
block). You can create "Conditional catch-blocks" by combining try...catch blocks with if...else if...else structures, like this: A common use case for this is to only catch (and silence) a small subset of expected errors, and then re-throw the error in other cases: When an exception is thrown in the try-block, exception_var (i.e., the e in catch (e)) holds the exception value. 500. catch, you can control program
JavaScript hatalarını try ve catch ile hataları kontrol edebiliriz. This identifier is only available in the catch-block's scope. The technical term for this is: JavaScript will throw an
handle it. catch, regardless of the result: JavaScript has a built in error object that provides error information when
If the value is wrong,
If no error occurs, this block of code is never executed, Optional. If an inner try statement does not have a catch-block, the enclosing try statement's catch-block is used instead. Now, if we already caught the exception in the inner try-block by adding a catch-block. Any given exception will be caught only once by the nearest enclosing catch-block unless it is rethrown. A ReferenceError is thrown if you use (reference) a variable
input, and other unforeseeable things.
The JavaS… Different web browsers may add more property to the error object.
for errors. If you'd like to contribute to the interactive examples project, please clone, The compatibility table on this page is generated from structured data. after try and catch, regardless of the result. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
They will not work in all browsers. In this example, we have made a typo in the code (in the try
SyntaxError: test for equality (==) mistyped as assignment (=)? The finally-block contains statements to execute after the try-block and catch-block(s) execute, but before the statements following the try...catch...finally-block. JavaScript catch anahtar kelimesi çalışma zaman hatası sonucu oluşan hataları ekrana yazdırmak için kullanılır. Daha sonra program finally bloğu ile yukarıda açıklandığı biçimde çalışmaya devam eder. syntax error. The source for this interactive example is stored in a GitHub repository.
be executed, if an error occurs in the try block.
Use SyntaxError instead. Content is available under these licenses. Newer versions of JavaScript do not throw EvalError.
The exception (err) is caught by the catch statement and a custom error message is displayed: The finally statement lets you execute code, after try and
Block of code to be executed regardless of the try / catch result.
JavaScript catches adddlert as an error, and executes the catch code to handle it. come in pairs: When an error occurs, JavaScript will
This gives us three forms for the trystatement: 1. try...catch 2. try...finally 3. try...catch...finally A catch-block contains statements that specify what to do if an exception is thrown in the try-block. Note that the finally-block executes regardless of whether an exception is thrown. If any statement within the try-block (or in a function called from within the try-block) throws an exception, control is immediately shifted to the catch-block. number (Microsoft).
Errors can be coding errors made by the programmer, errors due to wrong input, and other unforeseeable things. A RangeError is thrown if you use a number that is outside
be executed, if an error occurs in the try block. See the JavaScript Guide for more information on JavaScript exceptions.
The try statement consists of a try-block, which contains one or more statements. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: W3Schools is optimized for learning and training. This example examines input.
The try...catch statement marks a block of statements to try and specifies a response should an exception be thrown. You can catch programmer-generated and runtime exceptions, but you cannot catch JavaScript syntax errors. stack (Mozilla)
For example, Firefox adds file… range of expected types: A URIError is thrown if you use illegal characters in a URI function: Mozilla and Microsoft defines some non-standard error object properties: fileName (Mozilla)
If you use throw together with
At least one catch-block, or a finally-block, must be present. input, and other unforeseeable things. If an error occurs, JavaScript terminates the code execution and jumps to the catchblock. Tip: When an error occurs, JavaScript will normally stop, and generate an error
The example is supposed to alert "Welcome guest! While using W3Schools, you agree to have read and accepted our, Required.
Note: The catch and finally statements are both optional,
The finally statement lets you execute code,
A TypeError is thrown if you use a value that is outside the
The catch statement lets you handle the error. try catch. but you need to use one of them (if not both) while using the try statement. catch, regardless of the result: JavaScript Reference: JavaScript throw Statement. JavaScript Error Reference. Introduction to JavaScript Try Catch. an error occurs. lineNumber (Mozilla)
Also, if an exception is thrown, the statements in the finally-block execute even if no catch-block handles the exception. Specifies a local variable that refers to the error. The throw statement allows you to create a custom error.
The exception (err) is caught by the catch statement and a custom error message is displayed: Modern browsers will often use a combination of JavaScript and built-in HTML
Execution of the current function will stop (the statements after throw won't be executed), and control will be passed to the first catch block in the call stack.
If you haven’t already created an account, you will be prompted to do so after signing in. Examples might be simplified to improve reading and learning. The finally-block will always execute after the try-block and catch-block(s) have finished executing. Do not use these properties in public web sites. While using W3Schools, you agree to have read and accepted our, Sets or returns an error message (a string), An error has occurred in the eval() function. {} must always be used, even for single statements. to create a custom error (throw an exception). If you don't need the exception value, it could be omitted. To handle errors in JavaScript, you use the try...catchstatement: In this statement, you place the code that may cause errors in the try block and the code that handles the error in the catchblock. Block of code to be tested for errors while it is being executed, Required if used with catch. You can use this identifier to get information about the exception that was thrown. The try statement allows you to define a block of code to be
description (Microsoft)
When a catch-block is used, the catch-block is executed when any exception is thrown from within the try-block. The catch-block specifies an identifier (e in the example above) that holds the value of the exception; this value is only available in the scope of the catch-block. The variable can refer to the Error object (contains information about the occurred error, like the message "'addlert' is not defined").
JavaScript Errors Tutorial. Technically you can throw an exception (throw an error). The try statement is used to define a block of code to be tested for errors while it is being executed.
The try statement allows you to define a block of code to be
The catch statement allows you to define a block of code to
columnNumber (Mozilla)
Use the throw statement
tested for errors while it is being executed. Get the latest and greatest from MDN delivered straight to your inbox.
The following example shows one use case for the finally-block.
The latest versions of JavaScript added exception handling capabilities. JavaScript try and catch The try statement allows you to define a block of code to be tested for errors while it … errors. The difference becomes obvious when we look at the code inside a function. If the value is wrong,
Of course, any new exceptions raised in the "inner" block (because the code in catch-block may do something that throws), will be caught by the "outer" block. If you'd like to contribute to the data, please check out, https://github.com/mdn/interactive-examples, https://github.com/mdn/browser-compat-data, Error: Permission denied to access property "x", RangeError: argument is not a valid code point, RangeError: repeat count must be less than infinity, RangeError: repeat count must be non-negative, ReferenceError: assignment to undeclared variable "x", ReferenceError: can't access lexical declaration`X' before initialization, ReferenceError: deprecated caller or arguments usage, ReferenceError: invalid assignment left-hand side, ReferenceError: reference to undefined property "x", SyntaxError: "0"-prefixed octal literals and octal escape seq. At least one catch-block, or a finally-block, must be present.
