JavaScript String indexOf()

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Mohammad alshraideh answered on June 27, 2019 Popularity 10/10 Helpfulness 3/10

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JavaScript String indexOf()

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let str = "Please locate where 'locate' occurs!";
str.indexOf("locate");

//it will returns the index of (the position of) the first occurrence of a specified text in a string:
// >> 7

//if you find this answer is useful ,
//upvote ⇑⇑ , so can the others benefit also . @mohammad alshraideh ( ͡~ ͜ʖ ͡°)

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Contributed on Aug 13 2022

Mohammad alshraideh

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javascript indexof

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//indexOf getting index of array element, returns -1 if not found
var colors=["red","green","blue"];
var pos=colors.indexOf("blue");//2

//indexOf getting index of sub string, returns -1 if not found
var str = "We got a poop cleanup on isle 4.";
var strPos = str.indexOf("poop");//9

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Contributed on Jun 27 2019

Grepper

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js indexof string

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const paragraph = 'The quick brown fox';

console.log(paragraph.indexOf('T'));
>> 0

console.log(paragraph.indexOf('h'));
>> 1

console.log(paragraph.indexOf('Th'));
>> 0

console.log(paragraph.indexOf('he'));
>> 1

console.log(paragraph.indexOf('x'));
>> 18

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Contributed on Oct 22 2020

Ariel Ferdman

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Indexof method javascript

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// indexOf method only requires a single value 
// and returns the index of the FIRST value found in array
const cities = [
  "Orlando",
  "Dubai",
  "Denver",
  "Edinburgh",
  "Chennai",
  "Accra",
];

console.log(cities.indexOf("Chennai"));
// expected output is 4

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Contributed on Nov 06 2022

Code Walker

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js indexof string

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str.indexOf(searchValue[, fromIndex])

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Source: developer.mozilla.org

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Contributed on Jul 10 2020

Busy Booby

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.indexof() in javascript

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-1

var str = "We got a poop cleanup on isle 4.";
var strPos = str.indexOf("5");//9

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Contributed on Sep 16 2022

Dead Dolphin

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JavaScript String indexOf()

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var text = "Find the word location in this sentence";
text.indexOf("location");

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Contributed on Jul 08 2022

Javasper

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JavaScript String indexOf()

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