recently, I have been trying to take a screenshot of a web page. I have an idea that js can get the color of a coordinate point on the page , similar to the color picker , or the screenshot tool . canvas can get the color of a coordinate in the ar...
according to my understanding of the event loop mechanism of nodejs, if the poll queue is not empty in the poll phase, the queue will be traversed and the callback will be executed. When the poll queue is listed as empty, the callback of the next phase ...
Let s go to the code directly. There are the following situations: read the contents of the file test.txt, and the test.txt content is a Chinese character string: a little dripping . $homepage = file_get_contents( test.txt ); $homepage = mb_convert...
there is no problem with run dev, but there is such an error after opening the page. Yesterday, it was said to be normal, and today there was no change in the code. All of a sudden, what kind of error is this? Have you encountered any similar mistake...
how do I get a fixed link to a comment when paging is turned on? is currently in the format of https: kexue.fm archives 481., but if the way the comments are displayed changes, the address changes (the latest display changes to the oldest display in...
function Foo(){ getName=function(){alert(1);} console.log(this) return this; } Foo.getName=function(){alert(2);} Foo.prototype.getName=function(){alert(3);} var getName=funct...