gif.js | JavaScript GIF | Animation library
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kandi X-RAY | gif.js Summary
JavaScript GIF encoder that runs in your browser.
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Trending Discussions on gif.js
QUESTION
I am trying to display random gifs at onClick from GIFs API, but I am getting an error:
'Cannot read property 'images' of undefined'
when trying to get the URL for images.
Additionally, I have created a handleClick
function to get random GIFs on every click.
Main.js
...ANSWER
Answered 2021-Jan-22 at 23:52When the data is loading, data
(and thus results
) is an empty array. In your GifList
, when data is empty randomNumber
always equals 0. Then, when you map the randomGifs
array, you try to access results[0]
, which is undefined
since results is empty. This causes the error, since undefined
is not an object with property images
.
You should add a check for whether results
is empty (or whether results[random]
is undefined
) to solve the issue.
QUESTION
I tried to create an on-hover gif animation in an image block using jquery.js.
I use these animations in horizontal or vertical blocks arranged in a grid of three columns. When you hover over the block, the gif is launched, a colored form in blend mode is added with a typography over this gif
In my first example everything works fine, but when I wanted to add this code to a page of my website and changed the Z-index so that these elements no longer overlap on top of my menu-wrapper , the gif did not work anymore (second example).
First example : ...ANSWER
Answered 2020-Dec-13 at 16:57As @disinfor say in comments, there was the message $ is not defined
in the console.
I had to change the order of the scripts jquery.js
and gif.js
and all work fine.
QUESTION
I'm working on a discord bot with a command handler where I have all commands in their own files which I import into the main file. The issue I'm having with this is that I'm struggling to implement a prefix into the commands so all commands can just be triggered by text.
The way my command handler works is that I have this code in bot.js:
...ANSWER
Answered 2020-Aug-23 at 09:18you need to replace your method named:
QUESTION
I've been working with vuejs and bootstrap-vue lately. Decided to add unit testing to my project.
I'm not realy familiar with unit testing so I'm trying anything I could find to understand how it works.
Login.specs.js
...ANSWER
Answered 2018-Sep-26 at 12:33It is also possible to stub components like
QUESTION
I've been working on a custom GIF decoder for a project that I'm working on that requires as little of the GIF data to be stored in RAM as possible (so effectively I pull everything out of the file as I need it, byte by byte).
I've been working from the following tutorial:
http://matthewflickinger.com/lab/whatsinagif/bits_and_bytes.asp
with a little help from the specification itself:
https://www.w3.org/Graphics/GIF/spec-gif89a.txt
I can do both the non-animating GIF and the traffic light animated example with my decoder. But when I try to go through a GIF exported from www.piskelapp.com (which uses gif.js as its exporter), I get a lot of padding between different blocks, padding where in some cases there shouldn't be according to the specification.
For example, the following animation https://www.piskelapp.com/p/agxzfnBpc2tlbC1hcHByEwsSBlBpc2tlbBiAgICA_eOjCgw/edit has a beginning that looks like this:
...ANSWER
Answered 2019-Apr-12 at 18:26The answer is fairly straightforward. The GIF exporter used by Piskel simply has a poor implementation.
It explicitly states in the GIF89a spec:
"The Graphics Interchange Format(sm) as specified here should be considered complete; any deviation from it should be considered invalid, including but not limited to, the use of reserved or undefined fields within control or data blocks, the inclusion of extraneous data within or between blocks, the use of methods or algorithms not specifically listed as part of the format, etc."
The piece I want to point out is "the inclusion of extraneous data within or between blocks". In this case, the issue is data within blocks, for some reason the exporter Piskel uses always fills the color tables (global and local) with black for all remaining spaces. I realized this after discovering that may decoding implementation was wrong, which was causing issues when hitting the repeated "black" (#000000) color codes.
More information can be found in the spec itself, located here:
QUESTION
I'm trying to create a directive for our AngularJS application. It would be used like this:
...ANSWER
Answered 2018-Aug-28 at 18:35I've implemented something similar for your needs, it calls experimentIF
QUESTION
Need help with react... Trying to implement a collapsible list of cards with weather information. Already implemented the behavior of expand and collapse, but when i clicked on one panel the other panel open at the same time (i have 2 panels and need 7 to display weahter for 7 days of the week).
How can i open and close just one panel?
Code:
...ANSWER
Answered 2017-Dec-28 at 20:00I would have an object to represent the state, a field for each panel.
Like this:
QUESTION
I am making an attribute directive that will work similarly to ng-if
.
ANSWER
Answered 2017-Oct-22 at 08:13The example in the plunk has the problem:
QUESTION
I'm looking to get some help or guidance on the use of the excellent libgif.js
library.
My objective is to take a page that has an animated gif and a png of text with transparent background, and then show the 2 images overlaid such that the resulting image can be copied to the clipboard.
- I've succeeded in doing this with a static image as a template
- However, if I try this with a gif, it merges the animated gif with the text image, but freezes the gif.
I've familiarized myself with the libgif.js
library and have succeeded in using it to build a canvas from an animated gif and have it remain animated.
However, the text image is not being displayed in the final canvas, and I'm a little lost as to how I might go about fixing this.
Is it obvious to anyone why the textImage
is being properly sized and (somewhat) apparently placed on the canvas, but not displayed in the final result?
As a side question, does anyone know why the progress bar completes quickly at first and then progresses more slowly a second time?
The HTML is rather long, but the JS from the JSFiddle is shown below (for those not willing to click through to the link).
...ANSWER
Answered 2017-Aug-09 at 05:31You would have to tweak the library in order to get access to their rendering loop (like a frame_rendered event).
This way, you would be able to add whatever you want over the image the library drawn at every frame.
But since I'm too lazy to dig in there, here is a workaround :
Instead of appending the canvas returned by the library in the document, you can keep it offscreen, and draw it on an other, visible, canvas.
It is on this new canvas that you will also draw your textImage, in an rAF loop.
QUESTION
I have a webpage that uses D3, canvg and gif.js to generate GIFs of time-lapse maps. The page generates 3,000 gifs, one at a time. The page is not meant for public consumption.
While it works pretty well to just open this page and download the GIFs, it tends to be asking a lot of the browser. So I'm curious if there's a way to run a page headlessly from the command-line without actually opening it, but running the full app to render the page.
Why not just use Phantom from Node, you might ask? For starters, Phantom is hard! But more importantly, I've never had complete success using Phantom or any other client-side browser engine, like jsdom, to completely render SVGs exactly right.
So my question is basically whether it's possible to use Chrome instead of Phantom and launch a page from the command line that executes the page as if it was merely opened in the browser but without actually opening the page.
Thanks!
...ANSWER
Answered 2017-Apr-30 at 16:29You could use electron. The advantage would be you could very easily save your generated gifs, something you can't do with Chrome unless you also run a server.
Otherwise there are some docs for headless chrome here
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