Use an object as a map or Switch statement Alternative of multiple if else in JavaScript.
Switch alternative of multiple if else in JavaScript
Simple example code using object as a map:.
<!DOCTYPE html>
<html>
<body>
<script>
function getCode(input) {
var inputMap = {
"Corporation": "534",
"LLC": "535",
"LLP": "536",
"Partnership": "537",
"Sole Proprietorship": "538",
"Limited Partnership": "539"
};
var defaultCode = "540";
return inputMap[input] || defaultCode;
}
console.log(getCode("LLP"));
console.log(getCode("Lorem Ipsum"));
</script>
</body>
</html>
Output:
Use the switch statement, which is better for times when there is a single variable you want to check against multiple possible values:
<script>
function fruitColor(fruit) {
switch(fruit) {
case "apple" :
return 'green';
break;
case "banana" :
return 'yellow';
break;
case "kiwi" :
return 'green'
break;
case "plum" :
return 'red';
break;
}
}
var result = fruitColor("plum");
console.log(result);
</script>A switch combined with if/else
word = 'd';
switch (res.distance) {
case 0:
word = 'a';
break;
case 1:
if (res.difference > 3) {
word = 'b';
}
break;
case 2:
if (res.difference > 5 && String(res.key).length > 5) {
word = 'c';
}
break;
}Do comment if you have any doubts or suggestions on this JS if-else topic.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version