JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="1" class="myTextArea">
    123
</textarea>

<textarea id="2">
    456
</textarea>

JavaScript

//alternative 1
$(function() {
    $('textarea').each(function() {
        alert($(this).text())
    })
})

//alternative 2 only those who has specific class  
$(function() {
    $('textarea.myTextArea').each(function() {
        alert($(this).text())
    })
})

//alternative 3, handpicked textareas    
$(function() {
    var handPicked = ['#2', '.myTextArea']
    for (x = 0; x < handPicked.length; x++) {
        alert($(handPicked[x]).text())
    }
})