2020-08-01 Title source: http://www.h-camel.com/index.html
[html] Regarding H5 as an open platform, what are the modules to build it?
1.web storage API
2. LBS based on location services
3. Play audio and video without plug-ins
4. Invoke hardware devices such as cameras and GPU image processing units
5. Drag and drop and Form API
[css] What are the penetration properties of css?
1.VUE style penetration https://blog.csdn.net/idomyway/article/details/94659598
2. Click to penetrate pointer-event: none; //Allow pointer-event: auto; //Prohibit
[js] Use js to write a method to format number thousands
1. Insert a comma every 3 digits
/ 方法一 字符串
function toThousands(num) {
var result = '', counter = 0;
num = (num || 0).toString();
for (var i = num.length - 1; i >= 0; i--) {
counter++;
result = num.charAt(i) + result;
if (!(counter % 3) && i != 0) { result = ',' + result; }
}
return result;
}/
// 方法二 分组合并：先把数字的位数补全为3的倍数，然后join添加逗号，最后把补的多余的0删除
function toThousands(num) {
var num = (num || 0).toString(), temp = num.length % 3;
switch (temp) {
case 1:
num = '00' + num;
break;
case 2:
num = '0' + num;
break;
}
return num.match(/\d{3}/g).join(',').replace(/^0+/, '');
}
// 方法三 正则表达式
function toThousands(num) {
return (num || 0).toString().replace(/(\d)(?=(?:\d{3})+$)/g, '$1,');
}
[Soft skills] What is the difference between full-width characters and half-width characters?
1. Full-width: One character occupies 2 standard character positions. Chinese characters, graphic symbols, and special characters are all full-width, and are generally only used for word processing.
2. Half-width: One character occupies one standard character position. English letters, numbers, and symbol keys are all half-width. Half-width characters are ASCII characters.