微博字数计算

count.js

getWeiboLength = (text) => {
    const getLength = a => {
      if (!a) return 0;
      // eslint-disable-next-line no-control-regex
      const b = a.match(/[^\x00-\xff]/g);
      return a.length + (b ? b.length : 0);
    };
    const c = 41,
      d = 140,
      e = 20,
      g = text.match(/(http|https):\/\/[a-zA-Z0-9]+(\.[a-zA-Z0-9]+)+([-A-Z0-9a-z_\$\.\+\!\*\(\)\/\,\:;@&=\?~#%]*)*/gi) || [];
    let h = 0;
    let f = text;
    for (let i = 0, j = g.length; i < j; i++) {
      const k = getLength(g[i]);
      if (/^(http:\/\/t.cn)/.test(g[i])) { continue; }
      /^(http:\/\/)+(t.sina.com.cn|t.sina.cn)/.test(g[i]) || /^(http:\/\/)+(weibo.com|weibo.cn)/.test(g[i]) ? h += k <= c ? k : k <= d ? e : k - d + e : h += k <= d ? e : k - d + e;
      f = f.replace(g[i], '');
    }
    const l = Math.ceil((h + getLength(f)) / 2);
    return l;
  }