isEmpty(obj){
var regu = "^[ ]+$"
var re = new RegExp(regu)
if(typeof obj == "undefined" || obj == null || obj == "" || re.test(obj)){
return true
}else{
return false
}
},
用法：
if(this.isEmpty(this.keyword)){
console.log('空字符')
}
var str = "任意 字符串"if (str.indexOf(" ") == -1) {
alert("没有空格")
} else {
alert("有空格")
}
![在js编程中出现 this.items= [ ]; 怎么在语法上解释呢？](/aiimages/%E5%9C%A8js%E7%BC%96%E7%A8%8B%E4%B8%AD%E5%87%BA%E7%8E%B0+this.items%3D+%5B+%5D%3B+%E6%80%8E%E4%B9%88%E5%9C%A8%E8%AF%AD%E6%B3%95%E4%B8%8A%E8%A7%A3%E9%87%8A%E5%91%A2%EF%BC%9F.png)
