waitForElmWithTextToExist and getElmWithText

waitForElmWithTextToExist.js

function getElmWithText(selector, elmInnerText){
    var elms = document.querySelectorAll(selector);
    for(var i = 0; i < elms.length; i++)
        if (elms[i].innerText !== undefined && 
            elms[i].innerText.includes(elmInnerText))
            break;

    return elms[i];
}

function waitForElmWithTextToExist(selector, elmInnerText, thenAction){
    var elm = getElmWithText(selector, elmInnerText);
    if(elm !== undefined){
        thenAction(elm);
    }else{
        setTimeout(waitForElmWithTextToExist.bind(this, selector, elmInnerText, thenAction), 100);
    }
}


waitForElmWithTextToExist('button', 'Create public gist', function(btn){
    btn.click();
});