Advertisements console.time(‘onload’) console.time(‘onreadystatechange’) window.onload = ()=>{console.log(‘onload’); console.timeEnd(‘onload’)} document.onreadystatechange = ()=>{console.log(‘onreadystatechange’);console.log(document.readyState);console.timeEnd(‘onreadystatechange’)} I wrote the above code in an inline script, why the result is the following? In theory, console.time(‘onreadystatechange’) should be executed first, but from the results, the onreadystatechange event is executed first, and document.readyState is ‘complete’, why is the event advanced? >Solution : There will… Read More Why is the document.onreadystatechange function executed in advance?