In the previous tutorial, you learned to handle exceptions usingJavaScript try..catch statement. The try and catch statements handle exceptions in a standard way which is provided by JavaScript. However, you can use thethrowstatement to pass user-defined exceptions. In JavaScript, thethrowstatement ...
The complete technical term for the code above is thatJavaScript throws an error: myFn is not defined. Now JavaScript has a built-inthrowstatement that allows you to trigger an error. By usingthrow, you are technicallythrowing an exception. throwexpression; Here’s an example of athrowstatement...
Thethrowstatementthrows an exception. The exception can be a JavaScript String, a Number, a Boolean or an Object: throw"Too big";// throw a text throw500;// throw a number throwfalse;// throw a boolean throwperson;// throw an object ...
在JavaScript 1.4 中实现 ECMAScript 5.1 (ECMA-262) throw statementStandard ECMAScript 2015 (6th Edition, ECMA-262) throw statementStandard 浏览器兼容性 Desktop Mobile 功能ChromeFirefox (Gecko)Internet ExplorerOperaSafari 基本支持(Yes)(Yes)(Yes)(Yes)(Yes) ...
JavaScript: throw statementLast update on August 19 2022 21:50:38 (UTC/GMT +8 hours) DescriptionThe throw statement creates a user define exception. You can create your own exception for unexpected events and control the script properly to throw the exception in a try block and handle it ...
Statement throw Yes Yes Yes Yes Yes语法throw expression;参数值参数描述 expression 必需的。要抛出的异常。可以是字符串、数字、布尔值或对象。技术细节JavaScript 版本: ECMAScript 3相关页面JavaScript 教程: JavaScript 错误 JavaScript 参考手册: JavaScript try/catch/finally 语句...
When a JavaScript statement generates an error, it is said tothrowanexception.(在js中,程序产生错误,叫做抛出异常) Instead of proceeding to the next statement, the JavaScript interpreter checks for exception handling code. If there is no exception handler, then the program returns from whatever func...
(4)、SyntaxError: A syntax error occus inside of an eval() function call. All other syntax error are reorted by the browser and cannot be handled with a try...catch statement. (5)、TypeError. A variables type is unexpected. 6.URIError. An error ocuurs in the encodeURI() or the de...
The throw statement defines a custom error. Example Javascript exceptionExample Javascript exception In this example we misspelled "alert" as "allert" to deliberately produce an error: try { allert("Welcome to this test!"); } catch(err) { document.getElementById("pDemo").innerHTML = err....
JavaScript：在finally中使用return、continue、break、throw的疑惑？犀牛书(6版)对在finally从句中使用...