how to import mathjax in vue as local dependency? - javascript

im using vue-mathjax in my project and in the readme it says to use cdn of mathJax
works fine with the CDN version
im need to use mathJax(v. 2.7.2) as local as dependency for my project but dont know how to import it with the correct configurations
how do yout set the configuration same as with the cdn version?
CDN
<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/MathJax.js?config=TeX-AMS_HTML"></script>
Local import after installing with npm
//main.js
import '../node_modules/mathjax/MathJax?config=TeX-AMS_HTML'
error
Uncaught SyntaxError: Unexpected token '<'
repo - https://github.com/qwtfy/mathjax-test

If you're able to switch to the new version 3, here are the steps assuming you already have vue-mathjax.
Install MathJax from npm: npm install mathjax#3
Move the MathJax's es5 directory to a public directory: mv node_modules/mathjax/es5/ src/assets/mathjax/
Import the component config you want, for example:
import '../assets/mathjax/es5/tex-chtml.js';
If you must stick with version 2.7.x, you'll need to do the following. In my testing, it was less stable.
Install MathJax 2.7.9 from npm: npm install --save mathjax#2.7.9
Move MathJax.js (located at node_modules/mathjax/MathJax.js) to a public directory like assets.
Move TeX-AMS_HTML.js (located at node_modules/mathjax/config/TeX-AMS_HTML.js) to the same public diretory.
Import both files inside your component, in order:
import '../assets/MathJax.js'
import '../assets/TeX-AMS_HTML.js';
Here it is working for me:
Full single file component example using v3 and vue-mathjax.
<template lang='pug'>
div
b-container(style='width: 40%')
b-textarea(v-model='formula' cols='30' rows='10')
p output
vue-mathjax(:formula='formula')
</template>
<script lang="ts">
import { Component, Vue } from 'vue-property-decorator';
import { VueMathjax } from 'vue-mathjax';
import '../assets/mathjax/es5/tex-chtml.js';
#Component({
components: {
'vue-mathjax': VueMathjax,
},
})
export default class HelloWorld extends Vue {
formula = '$$x = {-b \\pm \\sqrt{b^2-4ac} \\over 2a}.$$';
}
</script>
Documentation of these steps can be found here and here.

Related

Vue typescript class component with vuedraggable

I am having error when importing sortableJs/vuedraggable with TS class component.
When using vuedraggable with standard JS standard component it's working fine.
here's my vuedraggable with standard JS component:
<script>
import draggable from "vuedraggable";
export default {
components: {
draggable
},
...
everything is working no error.
here's my vuedraggable with TS class component:
<script lang="ts">
import { Component, Vue } from "vue-property-decorator";
import draggable from "vuedraggable";
#Component({
components: {
draggable
}
})
export default class Board extends Vue {
...
here error occurred
Could not find a declaration file for module 'vuedraggable'.
implicitly has an 'any' type. Try npm install #types/vuedraggable
if it exists or add a new declaration (.d.ts) file containing `declare
module 'vuedraggable
so I did :
npm install #types/vuedraggable
npm ERR! 404 '#types/vuedraggable#latest' is not in the npm registry.
How can I use vuedraggable in a Typescript CLass Component?
You could create a local typings file and add the declarations for vuedraggable as described in this github issue as a workaround until the PR which adds the typings to the library gets merged.

Next.js with FortAwesome and SSR

I am building a Next.js application and looking for an icon package that works with its SSR paradigm.
After trying a few libs, I'm now working with FortAwesome/react-fontawesome, which looks promising.
The problem is when the page loads the icons are large (unstyled) and then suddenly they are styled properly. I'm trying to figure out how to get these to style server-side.
I've seen folks talk about importing a stylesheet provided by FortAwesome:
import '#fortawesome/fontawesome-svg-core/styles.css';
However, I'm unsure which file(s) this should be done in and also, Next complains when I try this:
[ error ] ./node_modules/#fortawesome/fontawesome-svg-core/styles.css
1:8 Module parse failed: Unexpected token (1:8) You may need an
appropriate loader to handle this file type, currently no loaders are
configured to process this file
I've looked at the CSS plugin, but this also seems like a red herring.
How can I get the font-awesome icons in this package to be styled on the server with Next.js?
React-fontawesome has added a section on how to get FontAwesome working with Next.js.
https://github.com/FortAwesome/react-fontawesome#nextjs
Create an ./pages/_app.js file in your project
import React from 'react'
import App, { Container } from 'next/app'
import { config } from '#fortawesome/fontawesome-svg-core'
import '#fortawesome/fontawesome-svg-core/styles.css' // Import the CSS
config.autoAddCss = false // Tell Font Awesome to skip adding the CSS automatically since it's being imported above
class MyApp extends App {
render() {
const { Component, pageProps } = this.props
return <Component {...pageProps} />
}
}
export default MyApp
or using a function component:
import { config } from '#fortawesome/fontawesome-svg-core'
import '#fortawesome/fontawesome-svg-core/styles.css' // Import the CSS
config.autoAddCss = false // Tell Font Awesome to skip adding the CSS automatically since it's being imported above
export default function MyApp({ Component, pageProps }) {
return <Component {...pageProps} />
}
There are definitely a few ways to take this problem. I solved it in my project by importing the icons I needed directly into my React app. So no Font Awesome libraries sit on the client-side, just the rendered SVGs.
import { FontAwesomeIcon } from '#fortawesome/react-fontawesome'
import { faAdobe } from '#fortawesome/free-brands-svg-icons/faAdobe'
...
return (
<FontAwesomeIcon icon={faAdobe} />
)
Font Awesome also provides a page to discuss other methods: server-side-rendering
I'm going to put this as an answer, because it's a way, however I feel like there is a better solution out there, so I will not accept this one.
I created a static/css folder, then copied the css file referenced in the question
cp node_modules/#fortawesome/fontawesome-svg-core/styles.css static/css/fortawesome.css
Then in _document.js I load the file via link tag:
<link
rel="stylesheet"
type="text/css"
href="/static/css/fortawesome.css"
/>
I would consider this a stop-gap solution. One issue obviously is that when the underlying library updates I would need to copy over the latest version of the css file manually.
I had this same issue and fixed it by manually inserting Font Awesome's CSS into styles which I know will get SSR'ed correctly.
I use styled-components, which is easy to set up with Next.js SSR, and here's how I did it:
import { createGlobalStyle } from "styled-components";
import { config, dom } from "#fortawesome/fontawesome-svg-core";
// Prevent FA from adding the CSS
// (not that it was doing it in the first place but might as well)
config.autoAddCss = false;
// Add the FA CSS as part of Global Styles
const GlobalStyles = createGlobalStyle`
${dom.css()}
`;
Here is what I have tried so far to fix this issue in my project:
Installation of #zeit/next-css, #zeit/next-sass [I need sass too.]
Installation of fontawesome packages & import CSS
Installation of #zeit packages
Install required packages:
npm i --save #zeit/next-css
npm i --save #zeit/next-less
npm i --save #zeit/next-sass
then update next.config.js file such as below that will support CSS import which fix the issue of loading correct styles upon loading:
const withCSS = require('#zeit/next-css')
const withLess = require('#zeit/next-less')
const withSass = require("#zeit/next-sass");
module.exports = withLess(withCSS(withSass({
webpack(config, options) {
config.module.rules.push({
test: /\.(png|jpg|gif|svg|eot|ttf|woff|woff2)$/,
use: {
loader: 'url-loader',
options: {
limit: 100000
}
}
});
return config
}
})));
Installation of fontawesome packages & import CSS
Install required packages:
npm i --save #fortawesome/fontawesome-svg-core
npm i --save #fortawesome/free-solid-svg-icons
npm i --save #fortawesome/react-fontawesome
Then you can use following code within your pages extending React.Component located under pages directory:
import { FontAwesomeIcon } from '#fortawesome/react-fontawesome';
import { library } from '#fortawesome/fontawesome-svg-core';
import { fas } from '#fortawesome/free-solid-svg-icons'
import '#fortawesome/fontawesome-svg-core/styles.css';
library.add(fas);
Then this is the way you can use fonts:
<FontAwesomeIcon icon={["fas", "user-tie"]} />
I may be wrong.

How to use Panzoom javascript in Angular 8+?

I am unable to use Panzoom Javascript library in Angular. I get
ERROR
Error: panzoom is not defined
Here is the stackblitz of what i have done till now .
Here is the working demo of how it should work
Can any one help me troubleshoot ? Thanks
I have followed all the steps mentioned in this post
It seems Panzoom does have typescript definitions Github Issue
here is a working stackblitz
import { Component, AfterViewInit, ElementRef, ViewChild } from '#angular/core';
import panzoom from "panzoom";
#Component({
selector: 'hello',
template: `<img id="scene" #scene src="https://www.probytes.net/wp-content/uploads/2018/01/5-1.png">`,
styles: []
})
export class HelloComponent implements AfterViewInit {
#ViewChild('scene', { static: false }) scene: ElementRef;
ngAfterViewInit() {
// panzoom(document.querySelector('#scene'));
panzoom(this.scene.nativeElement);
}
}
There is an easy way to do this.
Open your angular project in cmd terminal (root of your project, the same foler which contains /src).
Type npm install panzoom --save (that will add panzoom npm package to your angular.json and install it).
In your component add import import * as panzoom from "panzoom" (your project should automaticaly link it with the right file from node_modules.
in ngOnInit or anywhere needed add this line panzoom.default(document.querySelector('#lipsum'));
You should generally incject this PanZoom package in your component constructor after importing it from node_modules but I'm not sure if there is an integration provided by an author.
Definitely check NPM documentation of this plugin for more info

Critical dependency warning when using react-pdf

I'm trying to display a pdf on a react application and i get the following warning:
/node_modules/react-pdf/node_modules/pdfjs-dist/build/pdf.js
Critical dependency: require function is used in a way in which dependencies cannot be statically extracted
Vscode tells me this under the import function.
Could not find a declaration file for module 'react-pdf'
Already tried running npm install, npm install react-pdf and reinstalling the package
import React, { Component } from 'react';
import { Document } from 'react-pdf';
import sample from 'file location'
export default class viewer extends Component {
render() {
return (
<div>
<Document
file={sample}
onLoadSuccess={this.onDocumentLoadSuccess}
>
</Document>
</div>
);
}
}
Displays:
"Failed to load PDF file" in the browser
This code will display your pdf file, but issue will display in IDE console.
import { Document, Page, pdfjs } from "react-pdf";
pdfjs.GlobalWorkerOptions.workerSrc = `//cdnjs.cloudflare.com/ajax/libs/pdf.js/${pdfjs.version}/pdf.worker.js`;
In my case I'm using webpack 4 and it's not supportted yet.
If you build project it will work fine.
My full workaround.
Create a file at the root called config-overrides.js and it should contain the following:
module.exports = function override(config) {
config.module.rules[0].parser.requireEnsure = true
return config
};
After that npm i react-app-rewired to you app and change your build function in package.json to read react-app-rewired build/react-app-rewired start.
That should do it for now.

How to import Parse JS sdk into ionic 2 beta

am trying to import JS sdk into ionic 2 app, but i keep getting parse is undefined
In ionic 1.x ,parse js sdk is loaded via
<script ..parse.js </script>
and exposed as a global var, how do import in ionic 2 ,am using the npm module ,and tried
import * as parse from 'parse'
Do npm install parse --save in your project directory
Then import parse using
import { Parse } from 'parse';
It is better to create an parse provider.
You can use this starter template as a guide. It is a simple GameScores application in ionic to get you started.
https://github.com/Reinsys/Ionic-Parse
It shows how to create and read data from parse server. I also includes paging with ion-infinite-scroll scrolling.
After searching for a solution I came up with my own.
After installing the package and the typings, I opened the index.js of the node-module ionic-gulp-scripts-copy and added 'node_modules/parse/dist/parse.min.js' to the defaultSrc array.
Then, in my index.html, I included the script above the cordova.js.
Now I just need to declare var Parse: any; in every Component I want to use the SDK in.
For example, in my app.ts:
import {Component} from '#angular/core';
import {Platform, ionicBootstrap} from 'ionic-angular';
import {StatusBar} from 'ionic-native';
import {TabsPage} from './pages/tabs/tabs';
import{LoginPage} from './pages/login/login';
declare var Parse: any;
#Component({
template: '<ion-nav [root]="rootPage"></ion-nav>',
})
export class MyApp {
private rootPage: any;
private parse;
constructor(private platform: Platform) {
//this.rootPage = TabsPage;
this.rootPage = LoginPage;
platform.ready().then(() => {
console.log("Platform ready!");
// Okay, so the platform is ready and our plugins are available.
// Here you can do any higher level native things you might need.
StatusBar.styleDefault();
Parse.initialize('myStartUp', 'someKey');
Parse.serverURL = 'http://localhost:1337/parse';
});
}
}
ionicBootstrap(MyApp);
I do not think this is the way it should be used, but in the end I can use the SDK pretty easy and without much lines of implementation code.

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