function myFunction() {
var str = "word";
var n = str.includes("o");
document.getElementById("demo").innerHTML = n;
}
输出结果 true
if (entityid != "") {
filterString += "&& item.Entity.toUpperCase().includes(‘" + entityid + "‘)";
};
原文：https://www.cnblogs.com/mmit/p/14116644.html