html - How to pass text in a textbox to JavaScript function?

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html - How to pass text in a textbox to JavaScript function?

posted Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

html - How to pass text in a textbox to JavaScript function?

Suppose I have the following HTML code, how can I pass the user's input to execute(str) JavaScript function as an argument?

<body>

<input name="textbox1" type="text" />
<input name="buttonExecute" onclick="execute(//send the user's input in textbox1 to this function//)" type="button" value="Execute" />

</body>

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深蓝 · Answer 1 · 2021-10-17T01:06:54+0000

You could either access the element’s value by its name:

document.getElementsByName("textbox1"); // returns a list of elements with name="textbox1"
document.getElementsByName("textbox1")[0] // returns the first element in DOM with name="textbox1"

So:

<input name="buttonExecute" onclick="execute(document.getElementsByName('textbox1')[0].value)" type="button" value="Execute" />

Or you assign an ID to the element that then identifies it and you can access it with getElementById:

<input name="textbox1" id="textbox1" type="text" />
<input name="buttonExecute" onclick="execute(document.getElementById('textbox1').value)" type="button" value="Execute" />

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html - How to pass text in a textbox to JavaScript function?

html - How to pass text in a textbox to JavaScript function?

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