onload

return value calculated from javascript FileReader onload event [duplicate]

由 倾然丶 夕夏残阳落幕 提交于 2020-07-18 11:50:33
问题 This question already has answers here : How do I return the response from an asynchronous call? (39 answers) Closed 9 days ago . I have this function: function doStuff(range, file) { var fr = new FileReader(); var hash = ''; fr.onload = function (e) { var out = "stuff happens here"; hash = asmCrypto.SHA256.hex(out); return hash; }; fr.readAsArrayBuffer(file); return hash; } Right now, the function completes before the onload event is finished, so doStuff always returns "". I think a callback

Can I run jQuery function and on load and on change?

由 人盡茶涼 提交于 2020-05-11 05:12:08
问题 I want to run a script on page load first time (for default value of select element), and then on each change of select element. Is it possible to do it in one line, or do I need to duplicate function for this events? I know that I can use next structure: $('#element').on('keyup keypress blur change', function() { ... }); But it doesn't seem to support load event. Any ideas? 回答1: If i understand what you mean, just trigger any one of these events: $('#element').on('keyup keypress blur change'

Advantages of script tag before closing body tag when using events [duplicate]

由 本秂侑毒 提交于 2020-04-11 04:47:52
问题 This question already has answers here : Where should I put <script> tags in HTML markup? (22 answers) Closed 5 years ago . These days it seems like people recommend placing the script tag just before the closing body tag as such.. <script src="//javascript.js"></script> </body> </html> If you are running the script immediately, this is a good thing because most of your DOM has mostly loaded. However, what if you are using the onload or DOMContentLoaded events to call your main script? In

How to convert this onclick() function to onload() [duplicate]

由 我只是一个虾纸丫 提交于 2020-04-07 04:05:12
问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: How to make onclick automatically through onload function So I have the following function which is being called when I click a button. Here is the code: <a href="#" role="button" onClick="myFunction('parameter')"> How can I call this function as soon as page is loaded? I tried onLoad function but doesn't seem to work. 回答1: There are multiple options for onload event. In HTML <body onload="myFunction('parameter'

(set! (.-onload image) (fn [] )) not working

由 戏子无情 提交于 2020-03-25 18:47:07
问题 I have the following code which takes as input some images and then compresses them using the compress-omg function, which takes a data-url of each image inputted in sequence and stores the compressed blobs in a db vector :images (defn image-selector [] [:<> ;; appending image in this div [:div {:id "test-div"}] [:input {:type "file" :multiple true :id "input-image" :on-change (fn [e] (let [files (array-seq (.. e -target -files))] (doseq [file files] ;; must create a new file-reader in each

body onload and window.onload at the same time

由 落花浮王杯 提交于 2020-03-04 15:36:59
问题 Can I use body onload and window.onload at the same time? I've tried it using this code <body onload = "alertFirst()"> </body> <script> window.onload = alertSec; </script> But it didn't work. I just need someone to confirm it to me. Many thanks 回答1: If one or more of the scripts you want to use has the event handler in the BODY HTML tag, you can still move it to into javascript code. See the example below: Script #1: <script language="javascript"> function start(){ ...code for script #1... }
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