Solution 1 :

You can use CSS.escape() for this:

var NomClient = "L'ÉQUIPE";
var idClient = document.querySelector("#client option[value='" + CSS.escape(NomClient) + "']").dataset.value;

<div id="client">
  <option value="L'ÉQUIPE" data-value="yes">L'ÉQUIPE</option>
  <option value="Libération">Libération</option>
  <option value="Marianne">Marianne</option>

Solution 2 :

Try this

function getSite() {
  var NomClient = $("#choix_client").val()

  var idClient = $("#client option").filter(function() { return this.textContent.trim() === NomClient }).val()


    type: "POST",
    url: "getSite.php",
    data: 'client=' + idClient,
    success: function(data) {
   <option value="<?=$id?>"><?=$nom?></option> 

Problem :

I have an issue with my HTML datalist and the javascript to manage it…
My purpose is to change the values of a HTML “select” from a datalist.

Here is my datalist :

<input class="verylarge" id="choix_client" name="choix_client" type="text" list="client" autofocus="" required spellcheck="false" onChange="getSite(this.value);" title="Les simples quotes sont remplacées par des espaces"><br>
<datalist id="client">
  foreach ($tabCLIENTS as $value) { 
    list($id,$nom) = explode(";",$value);
    $nom = str_replace("'", " ", $nom);
    <option data-value="<?=$id?>" value="<?=$nom?>"> 
  <?php } ?>
<input type="hidden" name="idClient" id="idClient">

With the id number ($id), i want to change de values of the next Select option menu. My Javascript is activated on datalist change :

function getSite() {
  var NomClient = document.getElementById("choix_client").value;

  var idClient = document.querySelector("#client option[value='" + NomClient + "']").dataset.value;

  document.getElementById('idClient').value = idClient;

    type: "POST",
    url: "getSite.php",
    data: 'client=' + idClient,
    success: function(data) {

In my datalist, I have some Client names with single quote… (for examble : “L’EQUIPE”).
It’s a problem when i try to get the dataset value :

document.querySelector("#client option[value='"+NomClient+"']").dataset.value;

It’s impossible to protect de single quote with because the querySelector won’t find the good option…

If someone as an idea to help me…


Comment posted by mplungjan

Why not

Comment posted by Escape quotes in JavaScript

You might find some solutions for that by searching. For example: