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js怎么判断字符串里是否有某个数字。

比如一个字符串是var a = "2,3,4,5,6,7,11,22,33,44";

我想用 v-if 判断a里是否有2。有就返回true;

判断有没有1,11不能算进来。


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不知道字符串a是不是按照某种格式,如果是有固定格式的话

var a = "2, 3, 4, 5, 6, 7, 11, 22, 33, 44";
// convert to array
const numbers = a.split(", ");// split by ', '
// implement your logic
const include2 = numbers.find(number => number == 2);
const include1 = numbers.find(number => number == 1);

然后把这两个变量写成computed或者methods里,放到vue模版就可以了


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