StringUtil.js

/**
 * 获取字符串的长度ascii长度为1 中文长度为2
 * @param str
 * @returns {number}
 */
export const getStrFullLength = (str = '') =>
  str.split('').reduce((pre, cur) => {
    const charCode = cur.charCodeAt(0)
    if (charCode >= 0 && charCode <= 128) {
      return pre + 1
    }
    return pre + 2
  }, 0)

/**
 * 给定一个字符串和一个长度,将此字符串按指定长度截取
 * @param str
 * @param maxLength
 * @returns {string}
 */
export const cutStrByFullLength = (str = '', maxLength) => {
  let showLength = 0
  return str.split('').reduce((pre, cur) => {
    const charCode = cur.charCodeAt(0)
    if (charCode >= 0 && charCode <= 128) {
      showLength += 1
    } else {
      showLength += 2
    }
    if (showLength <= maxLength) {
      return pre + cur
    }
    return pre
  }, '')
}