javascript - So I'm making an Editor website, and I want to have a save button that will only save the code written in the box, and not the entire editor code

one text

Solution:

You can get what the user has typed in your textarea using the .value property and get the data that the user has written.

function runCode(){
  let userWrittenCode = document.getElementById("sourceCode");
  
  if(!userWrittenCode.value) console.log("Please write some code");
  else{
    //Do user input code sanitization
    console.log("Your Data is: ");
    console.log(userWrittenCode.value); 
  }
}

.btn-run {
  padding: 8px;
  background-color: #3A65FF;
  border: none;
  color: #FFFFFF;
  border-radius: 2px;
  transition: all 0.3s;
}

.btn-run:hover {
  background-color: #404040;
}

#outer {
  width: 100%;
  text-align: center;
}

.inner {
  display: inline-block;
}

<div id="outer">
  <div class="inner">
    <form><textarea name="sourceCode" id="sourceCode"></textarea></form>
    <button onClick="runCode();" class="btn-run" type="button" style="float: 
        none;">Save Code</button>
  </div>
</div>

Source