js export 对外输出常量、变量和函数

export const webName = 'SunShine 编程俱乐部';

export var year = 1958;

// 一个变量时
    import {year} from './utils/common.js'
 
// 多个变/常量时
 
    import {year,webName} from './utils/common.js'

const webName = 'SunShine 编程俱乐部';
var year = 1958;
export default {webName, year};

import data from './utils/common.js'

console.log(data.year)
console.log(data.webName)

// 计算文本长度
export function getLength(content) {
    if (typeof content === 'string') {
        //先把中文替换成两个字节的英文，再计算长度
        return content.replace(/[\u0391-\uFFE5]/g, "aa").length
    }
}

import {getLength} from './utils/common.js'

let contentLength = getLength(content)