I am trying to include a partial on the page with my backend coming later. I want to use an event listener button. It dosent work. I am using express.ejs and node.js with vanilla js.
I am using this for my vanilla js
const button = document.getElementById('button')
button.addEventListener('click',()=>{
const hi = document.createElement(`<%-require('../views/partials/hi.ejs')%>`)
document.appendChild(hi)
})
this for my html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>hi</title>
<link rel="stylesheet" href="main.css">
</head>
<body>
<button id="button">Im a button</button>
<script src="main.js" type="module"></script>
</body>
</html>
and this for my node
const express = require('express')
const app = express()
app.set('view engine','ejs')
app.use(express.static('public'))
app.get('/',(req,res)=>{
res.render('layout')
})
app.listen(5000,()=>{
console.log('server listening')
})
I get this error when i try to use the partial with the button
main.js:4 Uncaught DOMException: Failed to execute 'createElement' on 'Document': The tag name provided ('<%-require('../views/partials/hi.ejs')%>') is not a valid name.
at HTMLButtonElement.<anonymous> (http://localhost:5000/main.js:4:25)
this comes from client side....why and how to fix?
I would like to get the parameters in a URL and use them to generate an og:image meta tag in my SPA. The specific purpose is to have a dynamic thumbnail for a given url. The idea is for crawlers to be able to find the appropriate thumbnail.
example URL:
https://my.app/#/post?uid=abc&pid=123
These two parameters will not necessarily always be included. I hope it won't cause an issue.
My understanding is that crawlers generally only check the html for metadata. How could I include a bit of code in my html before the metadata? (I am relatively new to HTML)
Would I be able to put a script in the head tag? Are variable in the script available outside of the script? Can I use variable in the URL address of my og:image tag?
<!DOCTYPE html>
<html>
<head>
<meta property="og:image" content="https://my.app/{uid}/{pid}/thumb.png" />
<meta charset="UTF-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="description" content="Get Dressed. Better than you ever had">
<!-- iOS meta tags & icons -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="vestiqweb">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<!-- Favicon -->
<link rel="shortcut icon" type="image/png" href="favicon.png"/>
<title>VESTIQ</title>
<link rel="manifest" href="manifest.json">
</head>
<body id="app-container">
<script>
if ('serviceWorker' in navigator) {
window.addEventListener('load', function () {
navigator.serviceWorker.register('flutter_service_worker.js');
});
}
</script>
<script src="https://www.gstatic.com/firebasejs/7.17.1/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.14.4/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.17.1/firebase-auth.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.17.1/firebase-analytics.js"></script>
<script>
var firebaseConfig = {
//config info
};
firebase.initializeApp(firebaseConfig);
firebase.analytics();
</script>
<script src="main.dart.js?version=14" type="application/javascript"></script>
</body>
</html>
I was able to put a script before the meta tags and used window.location.href to get the URL. I used URLSearchParams to extract the parameters. However, I can only get the second parameter and not the first. If I add an '&' before the uid it works, but makes the url look weird... "?&uid"
<script>
const queryString = window.location.href;
const urlParams = new URLSearchParams(queryString);
const uid = urlParams.get('uid')
const pid = urlParams.get('pid')
if (uid != null && pid != null)
document.getElementById('urlThumb').content = `https://my.app/posts%2F${uid}%2F${pid}%2Furl_thumb.jpg?alt=media`;
</script>
I am working on a simple webpage. I have a following sample json file and an HTML template
data.json
{
"NAME":"SAMPLE_NAME",
"ADDRESS":"New Brunswick Avenue"
}
index.html
<div class="name"></div>
<div class="address"></div>
So i have to display the name and address on the template reading from the json file. Is there any library that i can user for this or any other way to accomplish this?
I think you are looking for a compile-time templating or pre-compiled templating engine sort of thing.
You can build one your own with html, css and using javascript or jquery to change the text of certain elements, but this is going to take a long time if you have big pages.
However there is a library out there that does something like this and its called Handlebars.
Heres a link: http://berzniz.com/post/24743062344/handling-handlebarsjs-like-a-pro
This might give you an idea of what it does: What is the difference between handlebar.js and handlebar.runtime.js?
Here is an example using your html:
<script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.12/handlebars.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<script>
// Load your html / template into this variable
var template = '<div class="name">{{name}}</div><div class="address">{{address}}</div>';
var jsonData = {
"name":"John",
"address": "City Street"
}
var compiledTemplate = Handlebars.compile(template);
// The output html is generated using
var html = compiledTemplate(jsonData);
document.getElementsByTagName('body')[0].innerHTML = html;
</script>
</body>
</html>
If you would rather write html outside of the javascript variables you could also do it like this:
<script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.12/handlebars.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div id="template">
<div class="name">{{name}}</div>
<div class="address">{{address}}</div>
</div>
<script>
// Load your html / template into this variable
var template = document.getElementById('template').innerHTML;
var jsonData = {
"name":"John",
"address": "City Street"
}
var compiledTemplate = Handlebars.compile(template);
// The output html is generated using
var html = compiledTemplate(jsonData);
document.getElementById('template').innerHTML = html;
</script>
</body>
</html>
I have a html file like this:
<html class="h-100">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Login</title>
<!-- main css -->
<link rel="stylesheet" href="../src/vendors/clarity-ui/css/clarity-ui.min.css">
<link rel="stylesheet" href="../src/scss/main.css">
</head>
I want to read html file for do that:
Extract name and path css or js file
Minify css or js
Copy to dist directory
Rename css or js path/name to new location and name
How to do that with Gulp and Gulp plugins?
Look at gulp-useref. It has a good example:
var gulp = require('gulp'),
useref = require('gulp-useref'),
gulpif = require('gulp-if'),
uglify = require('gulp-uglify'),
minifyCss = require('gulp-clean-css');
gulp.task('html', function () {
// I made a small change to gulp.src below
return gulp.src('./app/*.html')
.pipe(useref())
.pipe(gulpif('*.js', uglify()))
.pipe(gulpif('*.css', minifyCss()))
.pipe(gulp.dest('dist'));
});
[EDIT : Added your html]
<html class="h-100">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Login</title>
<link rel="stylesheet" href="../src/vendors/clarity-ui/css/clarity-ui.min.css">
<!-- build:css dist/css/main.css -->
<link rel="stylesheet" href="../src/scss/main.css">
<!-- endbuild -->
<!-- build:js ../dist/js/myJS.js -->
<script src="../src/js/myJS.js"></script>
<!-- endbuild -->
</head>
I assume you do not want to change the already minified vendor css. So there is no need to put a directive around it.
And useref will not concatenate the vendor css because it will not grab that asset since their is no build directive around it.
You can do something similar for your js files.
[EDIT : added folder structure.]
-[your working directory]
---[app]
-----test.html
---[src]
------[scss]
--------main.css
------[js]
--------myJS.js
-gulpfile.js
So the gulpfile.js is in your base working directory above the app and src folders.
Running gulp html from your working directory will create a 'dist' folder with your minified css and uglified js in it and your modified main.html.
I have run this on a test system with this folder structure and it works perfectly. Let me know if you still have problems.
I am using google fonts and it generates following error for below link
<link href="http://fonts.googleapis.com/css?family=Lato:100,300,400,700,900,100italic,300italic,400italic,700italic,900italic|Montserrat:700|Merriweather:400italic|Roboto+Condensed|Source+Sans+Pro|Droid+Serif|Open+Sans+Condensed|Oswald|Molengo|PT Sans|Droid Sans')" rel="stylesheet" />
ERROR MESSAGE
Line 35, Column 289: Bad value for attribute href on element link: Illegal character in query: not a URL code point.
…if|Open+Sans+Condensed|Oswald|Molengo|PT Sans|Droid Sans')" rel="stylesheet" />
Syntax of URL:
Any URL. For example: /hello, #canvas, or http://example.org/. Characters should be represented in NFC and spaces should be escaped as %20.
SAMPLE HTML
<html>
<head>
<title>Title</title>
<meta charset="utf-8" />
<meta name="viewport" content="user-scalable=no, width=device-width, initial-scale=1, maximum-scale=1" />
<link href="http://fonts.googleapis.com/css?family=Lato:100,300,400,700,900,100italic,300italic,400italic,700italic,900italic|Montserrat:700|Merriweather:400italic|Roboto+Condensed|Source+Sans+Pro|Droid+Serif|Open+Sans+Condensed|Oswald|Molengo|PT+Sans|Droid+Sans')" rel="stylesheet" />
</head>
<body>
</body>
</html>
UPDATE
This generates error
<link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Roboto%20Condensed|Source%20Sans%20Pro" />
This Works
<link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Lato" />
<link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Roboto%20Condensed" />
When i add | to add multiple fonts it generates error so should i use multiple <link> tag to add fonts or ?
Confused about this is as below links is generate by on Google fonts font use on website
https://www.google.com/fonts#UsePlace:use/Collection:Open+Sans|Roboto:400,700,400italic|Roboto+Condensed:400,300|Lato
Your example code working with JAVASCRIPT NOTATION
LINK and IMPORT may not help to eliminate the VALIDATION error - so please try with JAVASCRIPT notation it works well without any error.
<!DOCTYPE html>
<html>
<head>
<title>Title</title>
<meta charset="utf-8" />
<script type="text/javascript">
WebFontConfig = {google: { families: [ Lato:100,300,400,700,900,100italic,300italic,400italic,700italic,900italic|Montserrat:700|Merriweather:400italic|Roboto+Condensed|Source+Sans+Pro|Droid+Serif|Open+Sans+Condensed|Oswald|Molengo|PT+Sans|Droid+Sans ] }};
(function() {
var wf = document.createElement('script');
wf.src = ('https:' == document.location.protocol ? 'https' : 'http') +
'://ajax.googleapis.com/ajax/libs/webfont/1/webfont.js';
wf.type = 'text/javascript';
wf.async = 'true';
var s = document.getElementsByTagName('script')[0];
s.parentNode.insertBefore(wf, s);
})();
</script>
</head>
<body>
</body>
</html>
You will need to substiture & sign with &
<!DOCTYPE html>
<html>
<head>
<title>Title</title>
<meta charset="utf-8" />
<meta name="viewport" content="user-scalable=no, width=device-width, initial-scale=1, maximum-scale=1" />
<link href='http://fonts.googleapis.com/css?family=Open+Sans&subset=latin,cyrillic-ext,greek-ext,greek,vietnamese,latin-ext,cyrillic' rel='stylesheet' type='text/css'>
</head>
<body>
</body>
</html>
You may please use JAVASCRIPT notation for including the fonts from google
<!DOCTYPE html>
<html>
<head>
<title>Title</title>
<meta charset="utf-8" />
<meta name="viewport" content="user-scalable=no, width=device-width, initial-scale=1, maximum-scale=1" />
<script type="text/javascript">
WebFontConfig = {
google: { families: [ 'Open+Sans::cyrillic-ext,latin,greek-ext,greek,vietnamese,latin-ext,cyrillic' ] }
};
(function() {
var wf = document.createElement('script');
wf.src = ('https:' == document.location.protocol ? 'https' : 'http') +
'://ajax.googleapis.com/ajax/libs/webfont/1/webfont.js';
wf.type = 'text/javascript';
wf.async = 'true';
var s = document.getElementsByTagName('script')[0];
s.parentNode.insertBefore(wf, s);
})(); </script>
</head>
<body>
</body>
</html>
Few more suggestions
Always include doctype at the top of HTML page
Try the IMPORT and JAVASCRIPT alternatives to include the fonts.
Please use your own google font - to avoid typos I tried with new fonts from google.
The character | is not allowed in the query component (nor anywhere else in a URI). It would have to be percent-encoded with %7C.
So
http://fonts.googleapis.com/css?family=Lato:100,300,400,700,900,100italic,300italic,400italic,700italic,900italic|Montserrat:700|Merriweather:400italic|Roboto+Condensed|Source+Sans+Pro|Droid+Serif|Open+Sans+Condensed|Oswald|Molengo|PT+Sans|Droid+Sans')
should be this URI instead
http://fonts.googleapis.com/css?family=Lato:100,300,400,700,900,100italic,300italic,400italic,700italic,900italic%7CMontserrat:700%7CMerriweather:400italic%7CRoboto+Condensed%7CSource+Sans+Pro%7CDroid+Serif%7COpen+Sans+Condensed%7COswald%7CMolengo%7CPT+Sans%7CDroid+Sans')
There is a space in the string near the end
PT Sans|Droid Sans')"
should be escaped as:
PT%20Sans|Droid%20Sans')"