JavaScript in laravel-dompdf - javascript

I am using laravel-dompdf to generate a PDF with a summary of results, consisting of tables and a few images, nothing to spectacular. I would like to print highcharts in the generated PDF as well. So first, I want to try a simple javascript code to see if it was working... but it isn't. I have enabled the "DOMPDF_ENABLE_JAVASCRIPT" => true, but so far no luck yet. The simple code which I want to print:
<div>foo</div>
<span id="insertHere"></span>
<div>bar</div>
<script>
var el = document.getElementById('insertHere');
el.innerHTML = '<div>Print this after the script tag</div>';
</script>
This only prints the foo and bar.. Could someone please help me out?

Dompdf (or more specifically Back-end that it uses for PDF rendering) doesn't really render javascript. What it does is - it parse everything inside <script type="text/javascript"></script> tag and adds it in the special section of the pdf file.
I'm not sure if this javascript is what you need, since you can work with the dom tree outside of the <script> tag. What you can do is write simple scenarios, for example like this one:
<div>foo</div>
<span id="insertHere"></span>
<div>bar</div>
<script type="text/javascript">
app.alert({cMsg:"Message", cTitle: "Title"});
</script>
Try to open generated file and you will see alert.
Here more complete guide on what you can do inside javascript section: Acrobat JavaScript Scripting Guide

Related

How to resolve type name conflict from two separate Javascript libraries?

Let me start by saying that I'm primarily a C# programmer who only extremely rarely ventures into JavaScript.
I can write myself some JS code as long as its mostly plain. I can handle jQuery and the odd self-sufficient 3rd-party library, but couldn't code myself out of a wet paper bag when React, Angular, Bootstrap and others enter the scene. I'm also not used to using npm or any other similar package manager.
It was never really my job nor interest, so I never went there. Whenever I code some JS, I reference the required JS files in my <script> tags and then use them as directly as possible.
I'm currently creating a very simple proof of concept web app which will have its client parts rebuilt by competent people sooner or later. But in the mean time I have to provide the bare-bones functionality that will serve as a rough guideline for the next team to take over, whenever that might be.
I've picked two libraries that each seem easy to use and get the job done, when used separately. But when I try to use them together on the same page, I run into a problem: they both use the same name for their main type, and I can't seem to disambiguate between them.
These are the libraries:
JSON Editor
JSON Schema Form Builder
They both declare a type named JSONEditor, which I can use as long as I don't reference both of the libraries at once.
So far I've tried to solve this by using modules and import-ing the type using different names, but it didn't work... I got a bunch of errors in the console about "import not found" and "e is not defined", which makes me think I'm tackling this wrong.
How would I solve this using plain JS if possible?
UPDATE: As suggested, I'm providing a minimal example that demonstrates my use:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Test Page</title>
<link href="/lib/jsoneditor/jsoneditor.min.css" rel="stylesheet" type="text/css">
</head>
<body>
<div id="container">
<div id="editor" style="width: 300px; height: 200px;"></div>
<div id="form"></div>
</div>
<!--library 1: https://github.com/josdejong/jsoneditor -->
<script src="/lib/jsoneditor/jsoneditor.min.js"></script>
<!--library 2: https://github.com/jdorn/json-editor -->
<script src="/lib/jsonform/jsonform.min.js"></script>
<script>
// Library 1: The JSON code editor.
var editor = new JSONEditor(document.getElementById("editor"), { mode: "code" });
// Library 2: The form builder.
var form = new JSONEditor(document.getElementById("form"), {
ajax: true,
schema: {
$ref: "/api/describe/service/test"
}
});
</script>
</body>
</html>
If I comment out the use of one library (whichever), the other works as expected and the content is displayed at the respective target <div>. But if I try both at once, as shown above, nothing is displayed, and the following error is output to console:
Uncaught TypeError: t is undefined
This happens at the var editor = new JSONEditor line, which makes me think that the type from the second library overwrites the first and causes the problem.
This is understandable to me and isn't the issue per-se. The issue is that I don't know how to import the two JSONEditor types so that they can be referenced separately.
The maintainer of the code editor (JSON Editor, not JSON Schema Form Builder) has addressed and closed an issue about exactly this in the past: https://github.com/josdejong/jsoneditor/issues/270
His recommended solution is something like the following:
<script src="assets/jsoneditor/dist/jsoneditor.min.js"></script>
<script>
var JSONEditorA = JSONEditor;
</script>
<script src="assets/json-editor/dist/jsoneditor.min.js"></script>
<script>
var JSONEditorB = JSONEditor;
</script>
If you must use script tags this is probably the way to go.

How can I pass an html img element to a javascript included file?

This is a question from a noob in javascript. I tried to find something similar the last two days but I didn't find. I try to pass an html image element to an external javascript file which I include to the rest html code. The javascript fade in and fade out an image. Because I want to use different images everytime, thus I want to have a function in an external javascript file.
What I did so far:
PHP and HTML:
<?php
if ($success){
echo"<link rel='stylesheet' href='js/jquery-ui-1.11.4-smoothness.css'>
<script src='js/jquery-1.11.3.js'></script>
<script src='js/jquery-ui-1.11.4.js'></script>
<img id='tick' src='tick.png'>
<script type='text/javascript' src='js/success_failure_signs.js'>
success_failure(tick);
</script>";
}?>
Javascript file has this code:
function success_failure(tick){
var x = tick;
x.fadeIn();
x.fadeOut(1000);
}
The browser's console doesn't give any error.
It seems that the function success_failure doesn't get the image.
What is wrong on this code and how can I fix it?
Thank you in advance!
You haven't defined tick when you make your function call. Try this...
<script type="text/javascript" src="js/success_failure_signs.js">
</script>
<script type="text/javascript">
var tick = $("#tick");
success_failure(tick);
</script>
EDIT: I've also separated the inclusion of the script and your code to call it into two separate script tags.
maybe passing the image to the script is the wrong way of thinking here.
Most of the time with Javascript for web pages the JS gets the image from the HTML site itself.
You are already including jQuery so look into how to get an element from the page with jQuery.

JQuery Tooltip Troubleshooting

First off, I'm new to JQuery, so sorry if this is something simple and I'm just missing it.
I'm attempting to use the jquery plugin called "tooltipsy" (http://tooltipsy.com/).
The end goal is for this look here: http://screencast.com/t/4AghhAI7dL
This is what currently happens: screencast[dot]com/t/mBAIm67lM6W1 (sorry, couldn't post more than two links)
Inside my code I've copied it nearly identically from the examples, but I can't seem to get it to work. This is running inside a twig template file for a WordPress website, but I don't believe that, that should affect it (of course I could be, and probably am wrong)?
<a class="hastip" title="Phone Here">(ES?)</a>
<script type="text/javascript" src=" {{ wp.get_stylesheet_directory_uri() }}/assets/js/tooltipsy.min.js">
$('.hastip').tooltipsy();
</script>
It links to the CSS file in the header information, and the link works just fine.
My issue is the "tooltip" itself does not appear and I can't figure out why?
Would appreciate any and all help, thanks!
<a class="hastip" title="Phone Here">(ES?)</a>
<script type="text/javascript" src=" {{ wp.get_stylesheet_directory_uri() }}/assets/js/tooltipsy.min.js"></script>
<script>
$(document).ready(function() {
$('.hastip').tooltipsy();
});
</script>
You can't have code inside a script src.

Meteor.js: <script> tag doesn't work inside <body>

A simple script tag inside the body tag doesn't seem to work. The alert doesn't get triggered in the code below:
<body>
<script type="text/javascript">
alert('Hello');
</script>
{{>main}}
</body>
Any idea why?
Edit:
Just tried it with a fresh meteor app, no alert tag still:
<head>
<title>test</title>
</head>
<body>
<script type="text/javascript">
alert('Hello');
</script>
{{> hello}}
</body>
<template name="hello">
<h1>Hello World!</h1>
{{greeting}}
<input type="button" value="Click" />
</template>
Weird thing is when I copy paste the source of the html, made a new html page, and the alert will work.
Edit3: I deployed this app here: http://alert-in-body-test.meteor.com/
Do you get an alert box?
This question is still relevant in the current version of Meteor (version 0.5.4) so I wanted to describe how to include script at the end of the body.
To execute javascript at the end of the body, register a Handlebars helper and put the relevant code there, like this:
In client.html:
<body>
{{renderPage}}
{{afterBody}}
</body>
...
In client.js:
if (typeof Handlebars !== 'undefined') {
Handlebars.registerHelper('afterBody', function(name, options) {
$('body').append('AFTER BODY');
});
}
(For a great description of why this is required, see Rahul's answer to a similar question here: https://stackoverflow.com/a/14002991/219238 )
Its working for me
in onrender call this jquery
$.getScript('yours url')
It should work.
I have just pasted this inside one of my projects and it worked.
Your {{>main}} is strange for me tough. Also make sure that <body> is inside <html> tag.
Meteor is constructing the entire DOM from Javascript by rendering your page as a template -- the 'source' for your page as seen by the browser is basically:
<script type="text/javascript" src="/5a8a37bef5095c69bcd3844caf3532e1ba6d49bf.js"></script>
I can't find a definitive page stating that embedding a script tag in a template like this won't cause it to be executed, but it definitely feels against the spirit of what the framework is trying to achieve.
If the point is to achieve a clean separation of your markup and logic then why put it in the template. A better solution would be to use the meteor.startup call
Instead of looking the rendered html at developer tools, try looking the real downloaded html.
You will find a (probably) empty tag, with tons of script tags inside the .
In other words, the body of your meteor application is not the body of the final html, it's just your main template.
Instead, this ton on scripts shipped by Meteor, will load your templates.
So, your code will not run, cause it's been placed there. It's like when you manipulate DOM (with jQuery, for exemple), placing a script tag in DOM, after it's loaded. This script tag will not run.

How to call external JavaScript function in HTML

I have a small chunk of code I can't seem to get working. I am building a website and using JavaScript for the first time. I have my JavaScript code in an external file 'Marq_Msg.js' which looks like this:
var Messages = new Array();
Messages[0] = "This is message 1";
Messages[1] = "This is message 2";
Messages[2] = "This is message 3";
Messages[3] = "This is message 4";
function scroll_messages()
{
for (var i = 0; i < Messages.length; i++)
document.write(Message[i]);
}
and in my HTML file 'Index.html' I am trying to call it like this:
<div id="logo">
<marquee scrollamount="5" direction="left" loop="true" height="100%" width="100%">
<strong><font color="white"><script src="Marq_Msg.js">scroll_messages()</script></font></strong>
</marquee>
</div>
The 'logo' div is a CSS piece that I'm trying to marquee inside of. If I put the code embedded inside the 'head' tag and call it, it works perfectly! There are a few other things id like to do with this code (like space the messages out a little) but I can't get the code to work in the first place. I've also tried adding:
<script src="Marq_Msg.js"></script>
in the 'head' tag with a separate call, that was a no go. I also tried instead using:
<script type="text/javascript" src="Marq_Msg.js">scroll_messages()</script>
Hell, i even had the function try returning a string (even hardcoded a simple "hello" to be returned) but that didnt work either with and without the 'type':
//Marq_Msg.js
function scroll_messages()
{
return "hello";
}
//index.html
<script type="text/javascript" src="Marq_Msg.js">document.write(scroll_messages())</script>
What am I missing? Any help would be greatly appreciated!! I've looked all over Google, and every site I find wants to do it using some 'form'. I just want messages to be displayed across, no form attached.
If a <script> has a src then the text content of the element will be not be executed as JS (although it will appear in the DOM).
You need to use multiple script elements.
a <script> to load the external script
a <script> to hold your inline code (with the call to the function in the external script)
scroll_messages();
In Layman terms, you need to include external js file in your HTML file & thereafter you could directly call your JS method written in an external js file from HTML page.
Follow the code snippet for insight:-
caller.html
<script type="text/javascript" src="external.js"></script>
<input type="button" onclick="letMeCallYou()" value="run external javascript">
external.js
function letMeCallYou()
{
alert("Bazinga!!! you called letMeCallYou")
}
Result :
If anyone still has the reference error is probably because you are loading your Javascript with defer, or it's in the bottom of the body so when the function gets called your function still doesn't exist.

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