How to Specify Multiple Conditions in an If Statement in JavaScript

How to specify multiple conditions in an if statement in javascript

just add them within the main bracket of the if statement like

if ((Type == 2 && PageCount == 0) || (Type == 2 && PageCount == '')) {
            PageCount= document.getElementById('<%=hfPageCount.ClientID %>').value;
}

Logically this can be rewritten in a better way too! This has exactly the same meaning

if (Type == 2 && (PageCount == 0 || PageCount == '')) {

multiple conditions in an if statement in javascript

You can use Array.includes to check if the current pathname exists in a given array.

let pathArr = ['/', '/kurikulum/', '/pengembangan-diri/', '/statistik/', '/teknologi/', '/ekonomi/', '/desain/', '/corona/'];
let testPath = '/desain/';

if (pathArr.includes(testPath)) {
   document.write('path found!');
};

How to specify multiple conditions in an array and call it in an if statement in javascript

Don't enclose the boolean values in backticks, as that makes them strings.

const addition = (...numbers) => {

let arrayOfTest = [
    numbers.length === 0,
    numbers.some(isNaN),
    numbers === null,
];
if (arrayOfTest.includes(true)) {
    throw new Error("Invalid Input");
} else {
    return numbers.reduce((a, b) => {
        return a + b;
    });
}
};

How to specify multiple && and || conditions in if statement in javascript?

Solution:
I used this way to resolve the issue.

if($("#fb").prop("checked") || $("#tw").prop("checked") || $("#pin").prop("checked")) { 
    if ($("#tw").prop("checked")) { 
        if($('#tw_text').val().length <= 140) { 
           ...submit form... 
        } 
        else { 
            .... show error for twitter text length.... 
        } 
    } 
    else { 
        ...submit form... 
    } 
} 
else { 
    ... show error message to select minimum one of the options between fb,tw and pinterest ... 
}

javascript two conditions in if statement

Use && instead of and.

for (var num = 1; num <= 50; num += 1) {  if (num % 3 == 0 && num % 5 == 0) console.log("fizzbuzz");  else if (num % 3 == 0) console.log("fizz");  else if (num % 5 == 0) console.log("buzz");  else console.log(num);}

javascript multiple OR conditions in IF statement

With an OR (||) operation, if any one of the conditions are true, the result is true.

I think you want an AND (&&) operation here.

javascript - using if statement for multiple conditions vs switch case

Something like this?

let urls = ["url1.com", "url2.com"]

urls.forEach((url) => {
    if (window.location.href.indexOf(url) > -1) {
        alert("Do something")
    }
})

The idea is to use an array instead of many variables, and to loop through its items with forEach

How to Specify Multiple Conditions in an If Statement in JavaScript