После добавления скрипта на тему вордпрес, сайт перестаёт грузиться

var slider2Slides;
var slider2Select;
 
document.addEventListener('DOMContentLoaded', function() {
    slider2Slides = document.getElementsByClassName('slide_large');
    slider2Select = 1;
    slider2Next();
    document.getElementById('slider2Left').addEventListener('click', slider2Prev);
    document.getElementById('slider2Right').addEventListener('click', slider2Next);
});
 
window.addEventListener('resize', slider2Update);
 
function slider2UpdateShiftSize() {
    let shitSize = document.documentElement.clientWidth/7;
    if(shitSize > 220) shitSize = 220;
    if(shitSize < 50) shitSize = 0;
    return shitSize;
}
 
function slider2Prev() {
    slider2Select = slider2WhatNext(-1);
    slider2Update();
}
function slider2Next() {
    slider2Select = slider2WhatNext(1);
    slider2Update();
}
 
function slider2SelectSlide(num) {
    if(num > slider2Select) for(let i = slider2Select; i < num; i++) window.setTimeout(
        function() {
            slider2Next()
        }, (num-slider2Select-i)*150
    );
    else for(let i = num; i < slider2Select; i++) window.setTimeout(
        function() {
            slider2Prev()
        }, (slider2Select-num-i)*150
    );
}
 
function slider2Update() {
    let shitSize = slider2UpdateShiftSize();
    for(let i = 0; i < slider2Slides.length; i++) {
        slider2Slides[i].style.transform = "scale(.5) translateX(0px) translateY(15px)";
        slider2Slides[i].style.zIndex = 30000;
        slider2Slides[i].style.opacity = .01;
        slider2Slides[i].style.width = '';
    }
    slider2Slides[slider2WhatNext(-2)].style.transform = "scale(.6) translateX(-"+(shitSize*2)+"px) translateY(15px)";
    slider2Slides[slider2WhatNext(-2)].style.opacity = .4;
    slider2Slides[slider2WhatNext(-2)].style.zIndex = 40000;
    
    slider2Slides[slider2WhatNext(-1)].style.transform = "scale(.8) translateX(-"+shitSize+"px) translateY(15px)";
    slider2Slides[slider2WhatNext(-1)].style.opacity = .7;
    slider2Slides[slider2WhatNext(-1)].style.zIndex = 50000;
    
    slider2Slides[slider2Select].style.transform = "scale(1) translateX(0px) translateY(15px)";
    slider2Slides[slider2Select].style.zIndex = 60000;
    slider2Slides[slider2Select].style.opacity = 1;
 
    slider2Slides[slider2WhatNext(1)].style.transform = "scale(.8) translateX("+shitSize+"px) translateY(15px)";
    slider2Slides[slider2WhatNext(1)].style.opacity = .7;
    slider2Slides[slider2WhatNext(1)].style.zIndex = 50000;
 
    slider2Slides[slider2WhatNext(2)].style.transform = "scale(.6) translateX("+(shitSize*2)+"px) translateY(15px)";
    slider2Slides[slider2WhatNext(2)].style.opacity = .4;
    slider2Slides[slider2WhatNext(2)].style.zIndex = 40000;
}
 
function slider2WhatNext(num) {
    let slider2NextSlide = slider2Select + num;
    while(slider2NextSlide > slider2Slides.length-1) slider2NextSlide -= slider2Slides.length;
    while(slider2NextSlide < 0) slider2NextSlide += slider2Slides.length;
    return slider2NextSlide;
}