popup.js

function injectTheScript() {
    chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
        // query the active tab, which will be only one tab
        //and inject the script in it
        chrome.tabs.executeScript(tabs[0].id, {file: "collapse.js"});
    });
}
 
window.addEventListener('DOMContentLoaded', function(){
    const checkPageButton = document.getElementById('collapseGql');
    checkPageButton.addEventListener('click', function() {
        injectTheScript();
    })
})