revision:
The trimEnd() method removes whitespace from the end of a string. It does not change the original string.
This methodworks like trim(), but removes whitespace only from the end of a string.
string.trimEnd()
Parameters: none
<p>trimEnd() removes whitespace from the end of a string:</p>
<pre><;p id="demo"></p></pre>
<script>
let text1 = " Hello World! ";
let text2 = text1.trimEnd();
document.getElementById("demo1").innerHTML = "Length text1 = " + text1.length + "<br>Length text2 = " + text2.length;
</script>
<div>
<p id="trim-1"></p>
<p id="trim-2"></p>
<p id="trim-3"></p>
</div>
<script>
let text1 = " Hello World! ";
document.getElementById("trim-1").innerHTML = "untrimmed text : " + text1;
let text2 = text1.trimEnd();
document.getElementById("trim-2").innerHTML = "Length text1 = " + text1.length + "<br>Length text2 = " + text2.length;;
</script>