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Check if TextArea/TextBox contains a certain String

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无人共我
无人共我 2020-12-20 08:52

Given textarea is a textarea element with id \'textareabox\', how can I check if it contains a string within it?

var textarea = document.getElementById(\'tex
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  • 悲&欢浪女
    2020-12-20 09:30

    You can use .value, as:

    var textarea = document.getElementById('textareabox');

var word = 'something';

var textValue=textarea.value;  //-> don't use .innerHTML since there is no HTML in a textarea element

if (textValue.indexOf(word)!=-1)
{
  alert('found')
}
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  • 心在旅途
    2020-12-20 09:49

    You could do something like this:

    var textarea = document.getElementById('textareabox').value;

if (texarea.match(word) != null) {
    // do some stuff
}

    A better regex than what I did but I don't know regex all that well (forgive me regex ignorance).

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  • 北恋
    2020-12-20 09:54 

    body {
background-color: red;


}
    <html>
<h1>#mywebsite</h1>
<body>1+1=2?(yes <strong>or</strong> no)</body>
<input type="text" id="text" placeholder="text here"></input>
<button type="button" id="u" onclick="run()">submit</button>
<script type="text/javascript">


var a = 1;
function run() {
if (document.getElementById("text").value.includes("yes")) {
alert("correct!");
/*if the textbox includes "yes" it will say you got it right; basically whatever the input your user puts into the textbox it will test if the users sentence contains "yes" it alerts "correct!" into html if its wrong well it alerts "Try again!" the thing is, no matter what, if yes is in the sentance it will still say its correct.*/
/*if the snippet will not work use a different website to put code on */
document.body.innerHTML += "<li>attempt #" + a + ": correct";
a++
}
 
else {

alert("try again!")
document.body.innerHTML += "<li>attempt #" + a + ": try again";
a++
}



}
</script>

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