if there is content on the canvas canvas, use clearRect to empty the canvas and redraw it, which will cause the page to flicker visually
how to solve
if there is content on the canvas canvas, use clearRect to empty the canvas and redraw it, which will cause the page to flicker visually
how to solve
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problem: the IOS system entered the page for the first time and added if (navigator.geolocation) {}, but did not execute navigator.geolocation.getCurrentPosition (this.showPosition.bind (this), this.showError.bind (this), options); did not enter showPo...
need to take pictures and upload pictures. Use < input accept= "image * " capture= "camera " type= "file " > to call the camera, but prompt to get microphone permission ....
how to render side navigation according to different permissions. ...
for example, define a range from 1 to 100 randomly generate 20-50, 60-80, etc. The range in order cannot be superimposed something like this randomly generate a range of 1-100 [[6jue 9], [22jue 62], [40jue 23], [74jue 62], [76jue 97]] [[4je 9],...
I tried google edge firefox but did not support the justify-self attribute. Setting it has no effect. If you set justify-content in the parent tag, it will have an effect, but I want to set the effect on a single project. ...
1. I think using iframe to layout can do local refresh, the page experience is better, why this is not good. 2. Why is it better to use div for layout? With DIV layout, each click of a menu button refreshes the entire page. If the menu bar data on the...
do a video screenshot function. After canvas is finished, the picture is changed into a picture and saved locally. It is said that it is a cross-domain problem when checked on the Internet. My videos and pictures are in my local ah, and then put the pi...
I used mapVue to build a framework automatically. How can I switch between environments? for example, when I am developing, I call the interface of the development environment are there any related tutorials? I can t find the monitoring port when...
D:wamp64binapacheapache2.4.23bin I followed the steps in a video tutorial to modify the php.ini file in the above path. The following is the modified place upload_max_filesize = 2048m maximum limit for uploading files post_max_size = 2048m maximum da...
<template> <div> <button id="btnSubmit" type="button" class="btn btn-primary" @click="change" >< button> <button id="btnSubmit&qu...
took over our company s website two days ago: www.xxxxx.net simple 1.html now I have a problem. According to my logic, www.xxxxx.net this is the domain name; 1.html is the page under the simple folder; but I opened the server and found tha...
made a progress bar, which can be clicked and dragged on Android phones, but can only be dragged and dragged on iOS phones. What is this all about? Hurry! Hurry! Hurry! -sharp-sharp-sharp problem description Link address: http: wxqas.yayaim.com:86...
problem description the position of Chinese characters on Mini Program canvas is overwritten the environmental background of the problems and what methods you have tried related codes Please paste the code text below (do not replace the code...
such as product list <li> <img src= .. .. tu.png > <div>:12< div> < li> when I used to write in jquery, I stitched the li into a string, then looped through an array of pictures, and looped together the li stri...
html <input id="inviteLink1" type="text" value="http:www.66ddcc.cn user invite?uid=15467789331" > <button class="inviteBtn1" data-clipboard-action="copy" data-clipboard-target="-sharpinvit...
effect to be achieved: has a box. Wherever the box is moved, it will show the contents of this place and hide in other places. do you have any good ideas for implementation? ...
Why does the page refresh when < H1 > AJAX submits the form? < H1 > <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>TTT< title> < head> <body> <for...
(function() { $( -sharpservice_market_step ).wizard({ validator: function(step) { if($( -sharpagree ).prop( checked ) === true) { return true; ...
Native.js, Android can monitor incoming and outgoing phone calls (such as hanging up) in the front-end mui, but how does Apple s front-end code monitor incoming and outgoing calls? ...
I want to be a navigation bar. html is as follows: <div id="v3"> <nav> <a v-for= nav in tags :class="{ red : nav.isActive}" @mouseover= addColorTxt(nav) ...