jquery中怎么比较字符串是否相等

var str1 = "hello";
var str2 = "world";
if(str1 === str2){
  console.log("字符串相等");
}else{
  console.log("字符串不相等");
}

var str1 = "  hello  ";
var str2 = "world";
if($.trim(str1) === str2){
  console.log("字符串相等");
}else{
  console.log("字符串不相等");
}

var str1 = $("div#div1").text();
var str2 = "world";
if(str1 === str2){
  console.log("字符串相等");
}else{
  console.log("字符串不相等");
}

var str1 = $("input#input1").val();
var str2 = "world";
if(str1 === str2){
  console.log("字符串相等");
}else{
  console.log("字符串不相等");
}