text: /*
   * @lc app=leetcode.cn id=28 lang=javascript
   *
   * [28] 实现 strStr()
   */
  
  // @lc code=start
  /**
   * @param {string} haystack
   * @param {string} needle
   * @return {number}
   */
  var strStr = function(haystack, needle) {
  
  };
  // @lc code=end
  
  //* Testcase Example: '"hello"\n"ll"'