google.script.run.function() returns null
<p>On a Google Sheet, I have a sidebar form that allows the user to add information in another sheet.
I have to provide an ID for each row so that when the user adds an ID, a new ID is generated. </p>
<p>Example:
The sidebar form has two inputs: standard number (int) and standard (text). When the user adds these inputs, I want to put them into a worksheet with 3 columns: A = ID, B = Standard Number, and C = Standard.
To generate the IDs, I created a creeID() function on the server side (this function checks the last ID in the sheet and generates the next ID, worked well when testing) and when the user adds a row ("ajouter" button) to get a tab with this format <code>[ID, criteria number, criteria]</code> and push that tab using <code>appendRow()</code></code> to the worksheet p>
<p>I thought I could use a google script to run with <code>.withSuccessHandler()</code> like it says here, I tried a few things based on @Tanaike's help and this video.</p>
<p>一切似乎都工作正常，除了 <code>google.script.run.withSuccessHandler(data => {alert("preuve ajoutée")}).creeID()</code> 返回 <code>null</code ></p>
<p>这是我的 html 文件：</p>
<pre class="brush:php;toolbar:false;"><!DOCTYPE html>
<html>
<head>
<base target="_top">
<style>
...
</style>
</head>
<body>
<p>Indicateur</p>
<input type="number" name="indicateur" id="indic" value="" min = "1" max = "32">
<p>Preuve</p>
<input type="text" name="preuve" id="preuve">
<br>
<input type="button" value="Ajouter" onclick="ajouter()">
<span class="annuler" onclick="google.script.host.close()">Annuler</span>
<script>
function ajouter() {
const inputs = document.querySelectorAll('#indic, #preuve');
let tab = [google.script.run.withSuccessHandler(data => {alert("preuve ajoutée")}).creeID()];
// Récupération des valeurs
for (const input of inputs) {
tab.push(input.value);
}
// Si tous les champs sont vides
if (tab.join('') == '') {
alert('Le formulaire est vide !');
return;
}
// Vider les champs
inputs.forEach(input => input.value = '');
// Envoi dans la feuille
google.script.run.ajouterLigne(tab);
}
</script>
</body>
</html></pre>
<p>和 JavaScript 代码：</p>
<pre class="brush:php;toolbar:false;">function ajouterLigne(tab) {
const PREUVES = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("PREUVES");
console.log(tab)
PREUVES.appendRow(tab);
}
function creeID() {
const SHEET = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("PREUVES");
let lastRow = SHEET.getLastRow();
let lastIdRange = SHEET.getRange(lastRow, 1);
let lastId = lastIdRange.getValue();
let newId;
if (lastId == "ID") {
newId = 1;
} else {
newId = lastId 1;
};
return(newId)
}</pre></p>
