Problem Solving using JS 1 i-Assess

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Sat Oct 05 2024 05:46:39 GMT+0000 (Coordinated Universal Time)

const fs = require('fs');

// Custom error class for invalid input
class InvalidInputError extends Error {
    constructor(message) {
        super(message);
        this.name = "InvalidInputError";
    }
}

function validateInput(inputText) {
    if (!/^[a-zA-Z]+$/.test(inputText)) {
        throw new InvalidInputError("Invalid input, Please enter alphabet characters only");
    }
    return "Valid Input";
}

function main() {
    fs.readFile('input.txt', 'utf8', (err, data) => {
        if (err) {
            if (err.code === 'ENOENT') {
                console.error("The file 'input.txt' was not found.");
            } else {
                console.error("An unexpected error occurred:", err);
            }
            return;
        }

        const inputText = data.trim();
        
        try {
            const result = validateInput(inputText);
            console.log(result);
        } catch (e) {
            if (e instanceof InvalidInputError) {
                console.error(e.message);
            } else {
                console.error("An unexpected error occurred:", e);
            }
        }
    });
}

main();

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<form action="/new" method="post">
 
  <input name="title" type="text">
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  <button type="submit">Submit Form</button>
 
</form>

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var newURL = window.location.protocol + "//" + window.location.host + "/" + window.location.pathname + window.location.search

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    btns = document.getElementsByClassName("saveBtn");
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			//Add function here
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Replace Textarea with Codemirror editor

<link rel="stylesheet" type="text/css" href="plugin/codemirror/lib/codemirror.css">

<body>
	<textarea class="codemirror-textarea"></textarea>
</body>

<script>

$(document).ready(function(){
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    var editor = CodeMirror.fromTextArea(codeText, {
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});

</script>

<script type="text/javascript" src="plugin/codemirror/lib/codemirror.js"></script>

#javascript #nodejs #commandline

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npm install heroku-ssl-redirect

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var mongoose = require('mongoose');
var Schema = mongoose.Schema;

const exampleSchema = new Schema({
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});


var Example = mongoose.model('Example', exampleSchema);
module.exports = Example;

> More steps

#html #javascript #jsfunctions #dom #dommanipulation

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<html>

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<script>

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</script>

</html>

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#javascript #javascript #functions #parameters

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 const isRequired = () => { throw new Error('param is required'); };

const hello = (name = isRequired()) => { console.log(`hello ${name}`) };

// These will throw errors
hello();
hello(undefined);

// These will not
hello(null);
hello('David');
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#html #jquery #css #navbar

Underline active navbar link

// in css:
/* Display line under clicked navbar link */
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//in html: 
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Copy Text to Clipboard with Line Breaks

function copyToClipboard(){

    var codeToBeCopied = document.getElementById('code-snippet').innerText;
    var emptyArea = document.createElement('TEXTAREA');
    emptyArea.innerHTML = codeToBeCopied;
    const parentElement = document.getElementById('post-title');
    parentElement.appendChild(emptyArea);

    emptyArea.select();
    document.execCommand('copy');

    parentElement.removeChild(emptyArea);
    M.toast({html: 'Code copied to clipboard'})

    }

#javascript #promises #howto

How to Get the Domain From A URL Using Javascript

var url = "http://scratch99.com/web-development/javascript/";
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for (let [key, value] of Object.entries(object1)) {
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}

#javascript #jquery

jQuery.post() - AJAX for post requests

$.ajax({
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  success: success,
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Problem Solving using JS 1 i-Assess

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