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What is the usage of value in JavaScript
Home Web Front-end Front-end Q&A What is the usage of value in JavaScript

What is the usage of value in JavaScript

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Feb 08, 2022 am 11:08 AM
html javascript front end

In JavaScript, the value attribute can set or return the default value of the text field, and the syntax is "attribute.value=value" or "attribute.value".

What is the usage of value in JavaScript

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

What is the usage of value in JavaScript

The value attribute can set the default value of the text field.

Syntax:

Set attribute value

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attribute.value=value

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Return attribute value

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attribute.value

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Return value: String, representing the value of the attribute.

The example is as follows:

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<html>

<head>

<script type="text/javascript">

function alertValue()

  {

  alert(document.getElementById("password1").value)

  }

</script>

</head>

<body>

<form>

<input type="password" id="password1" value="thgrt456" />

<input type="button" id="button1" onclick="alertValue()" value="Show default value" />

</form>

</body>

</html>

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Output result:

What is the usage of value in JavaScript

##After clicking the button:

What is the usage of value in JavaScript

Related recommendations:

javascript learning tutorial

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