I'm working in a project with opencvjs and angularjs. I need to apply homography algorithm but when I create a Sift object, the console shows this error
TypeError: cv.Sift is not a constructor
Can somebody assist to tell me how can I resolve this problem?
You need to wait until OpenCV.js is compiled: cv['onRuntimeInitialized']=()=>{ doSomethingWithOpenCV() }
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I am trying to learn React using JSBin. I have simple example code BookList and BookInfo (renders items inside BookList).
http://jsbin.com/hoyeroz/2/edit?js,output
I am getting below error in the console:
Uncaught TypeError: Cannot read property 'call' of undefined
Is this a JSBin bug or am I declaring the React components incorrectly?
Your code is proper, and working also, don't know why it is not working on JSBin, because same code is giving proper output on jsfiddle.
check fiddle: https://jsfiddle.net/03Lm3zbv/
Update: After doing some Google search finally got this:
This is a bug with JSBin, and how it handles transpilation with Babel. If you add the pragma //noprotect to the top of your code it will work.
check the working code on JSBin: http://jsbin.com/gedavinodu/edit?html,js,output
There is no explicit bind call here. So what's not bound? Well, if you put this in your compontentDidMount, you'll see that you get the result you are looking for.
this.setState({ books: [{"body": "body text", "name": "the name"}]});
So the ajax call is failing. This seems suspect: $.ajax. It seems to me that the $ is not bound to the jQuery function you think it is.
I am migrating an application from Angular1 to Angular2, in which I used the svg.js library to draw an SVG. Some elements of the SVG contained "ng-click" directives, that I made the SVG library print to the final SVG.
That worked alright in Angular1, however, now the directive is called "(click)" and everything breaks. I traced the SVG sources and found that the following call
this.node.setAttribute(attr, value.toString())
results in the following error message:
VM22161:1 Uncaught DOMException: Failed to execute 'setAttribute' on 'Element': '(click)' is not a valid attribute name.(…)
Any ideas to solve that problem? Patching the SVG source would be ok for me, if there's no other way.
A valid and quick workaround is to use the binding syntax of Angular2, that allows to use "on-click" instead of "(click)".
I am using polymer 1.0.8 with angularjs through this library.and i am getting error
Uncaught TypeError: prototype.registerCallback is not a function
tried solutions mentioned in this and this link
Note: m not using any paper elements.
Note: no core or iron elements are used.m working on much simple example as a beginner.
but still m getting this error and no custom polymer element is working.please help me here.......
i don't know the reason behind it but i fixed this just by removing element's name from definition.
Polymer("x-double",{
properties:{});
to this
Polymer({
properties:{});
may be version's problem or something else...........
I lost two days trying to solve this problem by myself, but I give up. pleaseee help .
i want to load my tree using jstree and promise AngularJS
but I keep getting this error:
Uncaught Neither data nor ajax settings supplied.
i can see im my html page jsut the pluging loading and no result :(
y'll find in thi link my code .
http://plnkr.co/edit/kDjFCa4x6Ghyb3pwghXc?p=preview
Thank you very much :)
After some playing with your code, I got this: http://plnkr.co/edit/JfTVNdQnaGZV01wyQHtn
changes: third argument of scope.$watch to true, setting "json_data" to
"json_data" :{
"data":scope.jstree.data
}
(looks strange, but it's quirks of jsTree)
I've decided that I am going to try and learn backbone.js by making a web app. This is the first time I have done anything extensive in javascript, so the answer to my problem may be right in front of my face.
I have the web app on github, along with a running version that doesn't work. The javascript console just says that something is undefined when I don't think it should be. Here's the error that chrome gives for line 30 of app.js:
Uncaught TypeError: Cannot read property 'el' of undefined
I've sort of been referencing the backbone-fundamentals example modular to-do app, and it doesn't seem to have any issues with a similar thing.
If anyone could point out what I am doing wrong, I would be most appreciative!
Thanks in advance!
Your Machine view render method was missing return this and by default all methods return undefined - that's why chaining didn't work
Edit: and a small tip:
jQuery, Underscore and Backbone register globally - and thanks to that you don't have to define them as dependencies every time - it's enough if you require them in your main script once and after that you can access them from the global scope as you normally would
In my case i was returning this without the return keyword. As i was using javascript and not coffeescript it failed on me. So, if you are using javascript use return this; instead of just this in the last line of the render() function.
I also had a problem when using this.collection.on('reset', this.render(), this). I instead had to use this.collection.on('reset', this.render.bind(this));