const sleep = (milliseconds) => {
  return new Promise(resolve => setTimeout(resolve, milliseconds))
}

ts = () => {
    return Math.round((new Date()).getTime() / 1000);
}

async function a() {
    let items = [];

    document.querySelectorAll('.SpreadsheetTaskList .ProjectSpreadsheetGridRow-subtaskToggleButton').forEach(async function(item) {
        items.push(item);
    });


    for(var i=0; i<items.length; i++) {
        items[i].click();
        await sleep(600);
    }
}

let u = window.location.href;

async function b() {
    a();
    while(1) {
        let u1 = window.location.href;
        if (u1 != u && u1.indexOf('list') != -1) {
            a();
            u = u1;
        }
        await sleep(1000);
    }
} b();