Expecting Loose Comparison

In regular comparison, data type does not matter. This if statement returns true:

var x = 10;
var y = "10";
if (x == y)

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In strict comparison, data type does matter. This if statement returns false:

var x = 10;
var y = "10";
if (x === y)

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It is a common mistake to forget that switch statements use strict comparison:

This case switch will display an alert:

var x = 10;
switch(x) {
case 10: alert("Hello");
}

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This case switch will not display an alert:

var x = 10;
switch(x) {
case "10": alert("Hello");
}

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