throwexample2.htm

来自「这是javascript高级程序设计的源码」· HTM 代码 · 共 24 行

HTM
24
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<html>
    <head>
        <title>Try Catch Example</title>
        <script type="text/javascript">
                function addTwoNumbers(a, b) {
                    if (arguments.length < 2) {
                        throw new Error("Two numbers are required.");
                    } else {
                        return a + b;
                    }
                }
                
                try {
                    result = addTwoNumbers(90);
                } catch (oException) {
                    alert(oException.message);      //outputs "Two numbers are required."
                }

        </script>
    </head>
    <body>
    </body>
</html>

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