How to implement click plus one in javascript-Front-end Q&A-php.cn

How to implement click plus one in javascript

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Release： 2022-01-19 11:23:09

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Method: 1. Bind the click event to the button element and specify the time processing function; 2. In the event processing function, use the " " incremental operator to achieve the calculation plus one effect, the syntax is "specify element object.value;".

How to implement click plus one in javascript

The operating environment of this tutorial: Windows 10 system, JavaScript version 1.8.5, Dell G3 computer.

How to implement click plus one in javascript

#If you want to use JavaScript to implement click plus one, you can use the " "incremental operator.

The example is as follows:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <input type="text" value="0"><br><br>
    <input type="submit" value="加一">
    <script type="text/javascript">
        var text = document.getElementsByTagName(&#39;input&#39;)[0];
        var add = document.getElementsByTagName(&#39;input&#39;)[1];
        add.onclick = function numberadd(){
            text.value++;  
        }
    </script>
</body>
</html>

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Output result:

How to implement click plus one in javascript

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