Before you can crop a composite picture, you first need to understand canvas and cropper.
1. Create a node first: var c=ocument.createElement("canvas"); and
2. Create a drawing environment for c: var ctx = canvas.getContext("2d");
3. You can set the width and height: canvas.width=330; canvas.height=440 (see how bi ...
Added by crowezr on Sun, 26 Apr 2020 19:31:39 +0300
Implementation idea: nesting of main components (components call themselves)
Here is the data required by the component
Added by jeremywesselman on Sun, 26 Apr 2020 18:38:00 +0300
With the end of Jquery knowledge points, I also began to touch the framework.
At the beginning, I always hear the words "plug-in" and "framework". I wonder what's the difference between framework and plug-in? "??
There are countless plug-ins. Any function in a web page can be called a plug-in. It can be extracted separa ...
Added by sdlyr8 on Sat, 25 Apr 2020 20:18:05 +0300
1. Match 11 mobile phone numbers with the first letter of 1
2. Matching name, 3-6 characters in Chinese
3. Matching password must be 6-16 characters, and can only contain numbers, letters and underscores:
4. Matching mailbox
5. Match the number of the seat
6. Match ...
Added by Nameless12 on Thu, 23 Apr 2020 17:32:16 +0300
Added by MaxBodine on Sat, 18 Apr 2020 12:33:56 +0300
I. ES6 Basic Understanding
1. What is ES6?
Added by suomynonA on Sat, 18 Apr 2020 00:04:07 +0300
It has been more than ten years since I wrote the code.
Most of the time, I don't start because I know where to go, I just know I can't stay anymore, that's all.After being hit by the wind and rain, there will be a lot of u ...
Added by theqase on Fri, 17 Apr 2020 23:57:07 +0300
PHPer engaged in the financial industry has frequent capital calculation. If you don't pay attention to it, you may lose hundreds of thousands or even worse... Let's take an example:
Why is 0.1 + 0.2 not equal to 0.3? (correct result: 0.3000000000000004)
Why is 0.8 * 7 not equal to 5.6? (correct result: 5. ...
Added by tekkenlord on Thu, 16 Apr 2020 13:12:51 +0300
In this paper, based on the Supermap platform, the two-dimensional vector data of 84 to Mars is realized.
Converting data into the geographic coordinate system of wgs84 in iDesktop
In iDesktop, convert the data to geojson.
Note that the format should be utf-8, otherwise the Chinese field will be garbled.
Under nodejs, we use projzh ...
Added by jesbin on Wed, 15 Apr 2020 17:26:28 +0300
Foreword: The previous project used JsPlumb, a drag-and-drop flowchart technology from the Web, which is not really difficult, but it feels good to share some flash-like effects made with HTML in the project.
Jsplumb website: https://jsplumbtoolkit.com
1. Effect Diagram Display
Added by RTT on Wed, 15 Apr 2020 03:55:48 +0300