I have been doing some basic js but I am not sure if I am using semicolons correctly. Here is my code: Please correct me in the comments if I am using them wrong. Thanks, Reece C. Answer Modify the following lines and it’d look good to me, semi-colonwise. The semi-colon is only required in JavaScript when two statements are
Finding the selected index by getElementById isn’t returning the right value
The selection of the “building” drop-down should equal zero. It is on the the first option. Function search() is executed when the button beside the drop-down is selected. For some reason the alert is returning “It didn’t work.” Here is the selection drop-down. And here is the button. Answer Var a is in the wrong place and you don’t need
What is the pattern used by Google Tag Manager in order to observe de `dataLayer` Array?
I observed the dataLayer array and I don’t see any changes to push. No custom methods at all, actually. How is GTM observing the changes to the array? As far as I know, changes to an Array don’t throw any events, do they? Edit: I did some more research and found Google’s library for interacting with the dataLayer: https://github.com/google/data-layer-helper#listening-for-messages I’ll
Is there destructor in typeScript
Is there destructor in TypeScript? If not, how can I delete an object? I tried destructor() and ~ClassName() but it didn’t work. Answer JavaScript uses garbage collection to automatically delete objects when they are no longer referenced. There is no concept of destructors or finalizers. You can’t observe when an object is deleted by the garbage collector, nor is it
how to restrict special characters and ( /,*,+) only
We have one text Field.We know how to restrict special characters.But We need Allow alphabet and Numbers and hyphen(-) only.No need Sepcial characters but except (-) . Give me any idea. Mycode: If we tried this code it’s restrict spectal charecters but it’s allow -,/,+ Please guide me only allow number and alphabet and hyphen only Answer replace this section:
OnChange event using React JS for drop down
The onChange event does not work. Answer The change event is triggered on the <select> element, not the <option> element. However, that’s not the only problem. The way you defined the change function won’t cause a rerender of the component. It seems like you might not have fully grasped the concept of React yet, so maybe “Thinking in React” helps.
toLocaleString() doesn’t work in Safari browser
I used toLocaleString() method to input money comma in `javascript. But the problem is, IE and chrome browser result correctly except Safari browser. I delete cache several times but still doesn’t work. Answer The issue here is that number.toLocaleString is implemented differently on different browsers. On Safari, it chooses not to display with the person-friendly formatting we’re used to. It
Using chrome extension apis in typescript
I’m building a chrome extension written in TypeScript. I’m using WebStorm and I added the chrome-DefiniteltyTyped library in my project. However, when I write this in my typescript code : chrome.extension.getURL I got an error : cannot find name ‘chrome’. Because of this, my javascript file is not generated and I cannot use it in my extension. Do you guys
ReadFile in Base64 Nodejs
I’m trying to read an image from client side encoded in base64. How to read with nodejs? My code: But, I got this error: Answer Latest and greatest way to do this: Node supports file and buffer operations with the base64 encoding: Or using the new promises API:
WebGL – cannot reader property createShader of null
I am following a book called professional WebGL, I am hand writing stuff making sure of my understanding, I have this code: for some reason, it says that it can’t read property null for createShader here: shader = gl.createShader(gl.VERTEX_SHADER); But it doesn’t complain at all for the same declaration but with the fragment shader. Answer Slightly changed version. gl.celar was