the following code:
document.querySelector(".div-bgd").style.display = "block";
document.querySelector(".load_div").style.display = "block";
console.log(1)
alert(1) browser environment, why execute console and alert statements first instead of the first two statements that have changed styles?
examples are as follows:
learn the execution order of js engine threads and GUI rendering threads
setTimeout solves the problem of GUI rendering thread blocking
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