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 ...
As you may notice, although the error is logged into the console, the log “The function is finished” is not printed to the console. This is because the general behavior of JavaScript is to throw an exception and stop the code execution. By using the combination ofthrowstatement andtry.....
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 ...
The 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 in the catch block. Syntax throw exception; Parameters exception: String, integer, Boolean or an objec...
在JavaScript 1.4 中实现 ECMAScript 5.1 (ECMA-262)throw statement Standard ECMAScript 2015 (6th Edition, ECMA-262)throw statement Standard 浏览器兼容性 Desktop Mobile 功能ChromeFirefox (Gecko)Internet ExplorerOperaSafari 基本支持 (Yes) (Yes) (Yes) (Yes) (Yes) 功能AndroidChrome for AndroidFirefo...
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...
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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...
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...
// The try block wraps around the main JavaScript // processing code. Any JavaScript statement inside // the try block that generates an exception will // automatically throw that exception to the // exception handling code in the catch block. ...