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How to get modified value in JavaScript

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2021-04-30 11:17:563074browse

The method for JavaScript to obtain and modify value is to use the value attribute to modify its value. The code is [var a=document.getElementById("hello");].

How to get modified value in JavaScript

The operating environment of this tutorial: Windows 7 system, JavaScript version 1.8.5, DELL G3 computer.

javascript Get the method of modifying value:

Some elements have value attributes, such as input, bottom, select, etc. You can use the value attribute to modify its value.

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>修改value</title>
    </head>
    <body>
        <input type="text" name="hello" value="Hello krray" id="hello">
        <script>
            var a=document.getElementById("hello");
            alert( a.value);
            a.value="你好,小凯"
        </script>
    </body>
</html>

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