“,NaN,0—>false
    >,<,=返回的是boolean
    先将两边的值转为number,再比较
    NaN和任何值做计算,结果一定是NaNvar a-true;

    1. <!DOCTYPE html>
    2. <html lang="en">
    3. <head>
    4.     <meta charset="UTF-8">
    5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
    6.     <title>Document</title>
    7. </head>
    8. <body>
    9.     <script>
    10.         //"",NaN,0-->false
    11.         // >,<,=返回的是boolean
    12.         //先将两边的值转为number,再比较
    13.         //NaN和任何值做计算,结果一定是NaNvar a-true;
    14.         var a = true;
    15.         var b = "10";
    16.         var c = "hello";
    17.         console.log(a>b);//Number (a)>Number(b);
    18.         console.log(a>c);//Number (a)>Number(c);
    19.         console.log(Boolean(NaN));//false
    20.     </script>
    21. </body>
    22. </html>
    <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var a = true;
        var c = 1;
        console.log(a==c);
        console.log(a=="1");
    </script>
</body>
</html>