字符串转数组split() 函数和数组转字符串join() 函数实例

var string="abcdefg"
console.log(string.split(''));
// 输出结果：["a", "b", "c", "d", "e", "f", "g"]

var array=["a", "b", "c", "d", "e", "f", "g"];
console.log(array.join(','));
// 输出结果：a,b,c,d,e,f,g

• <input type="text" oninput="value= value.match(/\d+(\.\d{0,2})?/) ? 
  this.value.match(/\d+(\.\d{0,2})?/)[0] : ''" placeholder="请输入...">