Which html elements have the for attribute

HTML elements with for attributes: 1. label element; when for is used with the label element, the for attribute specifies which form element the label is bound to. 2. Output element; when for is used with the output element, the for attribute specifies the relationship between the calculation result and the elements used in the calculation.

The operating environment of this tutorial: Windows 7 system, HTML5 version, Dell G3 computer.

HTML elements to which the for attribute applies

#When for is used with the element, for Property specifies which form element the label is bound to.

When used with the

element, the for attribute specifies the relationship between the calculation result and the elements used in the calculation.

Element name	Description

##label for attributeThe for attribute specifies which form element the label is bound to .

Syntax

<label for="element_id">

element_id: label The id of the element to be bound.

Example

<form action="/jc_script/action.php">
  <label for="php">PHP</label>
  <input type="radio" name="lang" id="php" value="php"><br>
  <label for="java">Java</label>
  <input type="radio" name="lang" id="java" value="java"><br>
  <label for="python">Python</label>
  <input type="radio" name="lang" id="python" value="python"><br><br>
  <input type="submit" value="提交">
</form>

Tag for attributefor attribute specifies the calculation result Relationship to elements used in calculations.

Grammar

<output for="element_id">

Example

<form oninput="x.value=parseInt(a.value)+parseInt(b.value)">0
<input type="range" id="a" value="50">100
+<input type="number" id="b" value="50">
=<output name="x" for="a b"></output>
</form>

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