https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/substr

从链接:

string.substr(start[, length])

只是另一个建议，删除任何尾随空白

limitStrLength = (text, max_length) => {
    if(text.length > max_length - 3){
        return text.substring(0, max_length).trimEnd() + "..."
    }
    else{
        return text
    }

这是我的解决方案，其中也包括修剪空白。

const trimToN = (text, maxLength, dotCount) => {
  let modText = text.trim();

  if (modText.length > maxLength) {
    modText = text.substring(0, maxLength - dotCount);
    modText = modText.padEnd(maxLength, ".");

    return modText;
  }

  return text;
};

trimToN('Javascript'， 6,2)将返回“Java..”

为什么不直接使用substring…字符串。substring(0、7);第一个参数(0)是起点。第二个参数(7)是结束点(独占)。更多信息请点击这里。

var string = "this is a string";
var length = 7;
var trimmedString = string.substring(0, length);

https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/substr

从链接:

string.substr(start[, length])

我认为你应该使用这个代码:-)

    // sample string
            const param= "Hi you know anybody like pizaa";

         // You can change limit parameter(up to you)
         const checkTitle = (str, limit = 17) => {
      var newTitle = [];
      if (param.length >= limit) {
        param.split(" ").reduce((acc, cur) => {
          if (acc + cur.length <= limit) {
            newTitle.push(cur);
          }
          return acc + cur.length;
        }, 0);
        return `${newTitle.join(" ")} ...`;
      }
      return param;
    };
    console.log(checkTitle(str));

// result : Hi you know anybody ...