JavaScript

How to create an Email Extractor Project with JavaScript Get emails from text download as text file

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Create an email extractor to extract all unique emails from a block of text. This project creates an email extractor which can be used by pasting a block of text into the textarea, then selecting the separator for the output file contents. The unique emails addresses that are retrieved from the text block will be … Read more

JavaScript Regular Expressions and Pattern matching within Strings Email Extract

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JavaScript Regular Expressions and Pattern matching within Strings Email Extract Regexp with match and matchAll() methods 1Use of test() and exec() 3replace() and replaceAll() methods 4search() method 4Find Email Pattern 6Email Extractor Project 8How to create a text file download 12 Regexp with match and matchAll() methods const txtArea = document.querySelector(‘textarea’);const btn = document.querySelector(‘button’);const res … Read more

Learn JavaScript coding lesson How to use Regular Expression RegExp to find Email Pattern in string

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Regular expressions provide a powerful way to create patterns that can be matched from string content in JavaScript code. To find all matches of a typical email there are several ways to create the pattern. Start by setting up a grouping of the patterns, using the () adding the global flag to match all the … Read more

Learn JavaScript Regular Expression RegExp with search method for string values

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RegExp with search() methodThe search() method will return a value of the index within the string of the first occurrence that matches the pattern, if no match is found then the result will return a value of -1. You can use the i flag within the regular expression to match on the pattern regardless of … Read more

RegExp with replace and replaceAll methods Learn JavaScript how to apply Regular Expressions

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The replace() method returns a new version of the original string with the pattern matched values being replaced by the new string value. RegExp can be used to set the pattern to be matched, if the pattern is a string value only the first occurrence of the matched results will be replaced. Using a string … Read more

Regex with Match and MatchAll methods in JavaScript

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The match() method will return the resulting match of the string value from the regular expression pattern. Depending on if the g flag is used, which is the global flag the results will be returned without the g flag as the first pattern match result including the index value and the string, or with the … Read more

How to use JavaScript Regex both literal notation and regexp object constructor method with examples

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Regular Expressions provide a powerful way to extract information from text content.   Regular Expressions or Regex can be used to search text and find matches on the search pattern.   The returned results are the matches from the text on the search pattern provided.  The search pattern can get fairly complex, this chapter is … Read more

JavaScript lesson Regex Checking for Numbers in the input field

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Regex Checking for Numbers in the input field  Check for values that match a Regex pattern in the input field.  Push a button and apply the match checker to return the results in the console.  <!DOCTYPE html> <html> <head>   <title>JavaScript Course</title> </head> <body>   <div class=”main”>   <input id=”nums” ><button>Submit</button>   </div>   <script> … Read more

Learn JavaScript Complete Lesson JavaScript Typing Game from scratch Typing Skills Game

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Words Typing Display Game Words Typing Display Game Exercise is to create a speed typing game using JavaScript, the game will test time and accuracy of typed words.  Each word will show, as well as the following word in the random word sequence.  The objective of the JavaScript game is to type the words accuray … Read more

JavaScript Lesson Start and Stop Timer GetTime For Timer using Date

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GetTime For Timer using DateHow to set up a timer based on a JavaScript Date object. This project will create a set of buttons that can start and stop a timer. The timer values are based on the ECMAScript epoch from the Date object in JavaScript that can be returned using getTime(). This format will … Read more