• Target detection in the loss of focus of the introductory guide!


    By guest blogCompile FlinSource: analyticsvidhya introduce Object detection is one of the most widely studied topics in the computer vision community. It has entered various industries, involving use cases from image security, surveillance, automatic vehicle systems to machine inspection. At present, object detection based on deep learning can be roughly divided into two categories Two […]

  • How to monitor the closing of keyboard pop-up in flutter


    preface Recently, when I was working on the company’s flutter project, I received a demand that the essence of it is to realize the function of losing the focus of textfield component when I put away the keyboard. At first glance, this demand is easy to solve, I thought, that’s it! That’s it! That’s it! […]

  • The processing of H5 mobile phone keyboard pop up


    This article first appeared in hzzly’s blog The original text of H5 Foreword: the front-end time also started the tossing journey of H5 mobile terminal according to the needs of the project, and expanded two TOC mobile terminal projects on the basis of the current middle platform. The following is a summary of the compatibility […]

  • Input box lost focus event and button click event conflict


    The scene is like this: click the input box to lose the focus will trigger the verification method, and click the submit button to trigger the verification method. If the user clicks the input box and then click the submit button, the lost focus method and the submit button method will be triggered at the […]

  • Appdelegate. M lifecycle


    AppDelegate.m // // AppDelegate.m // FirstIOS // // Created by MaTsonga on 14-2-23. //Copyright (c) 2014 matsonga. All rights reserved // #import “AppDelegate.h” @interface AppDelegate () @end @implementation AppDelegate – (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { Nslog (@ “program started…); return YES; } – (void)applicationWillResignActive:(UIApplication *)application { Nslog (@ “program will lose focus…); // Sent when […]

  • A useful pseudo class selector: focus within


    Pseudo class selector focus within, which indicates that an element gets the focus, or the descendant of that element gets the focus. Focus, it or its offspring get the focus. This means that it, or its offspring, gets the focus and can trigger it:focus-within。Code example: //html <div class=”container” tabindex=”0″> <label for=”text”>Enter text</label> <input id=”text” type=”text” […]

  • The difference between html4 and HTML5 is how to add focus implementation code to an input


    html4: Copy code The code is as follows: <form> <p><label>Username:<input name=search type=”text”></label></p> <script type=”text/javascript”> document.getElementById (‘search’).focus() </script> </form> html5: Copy code The code is as follows: <form> <p> <label>Search:<input name=search autofocus></label> </p> </form>

  • JavaScript serialization 36 – upload files and get input form focus


    1、 Form label focus window.onload = function (ev) { var input = document.getElementsByTagName(“input”)[0]; //1. Get the focus, that is, press the cursor of the mouse input.onfocus = function (ev1) { //This is a pointer to a variable this.style.width = ‘600px’; this.style.height = ’40px’; this.style.outline = ‘none’; this.style.fontSize = ’20px’; } //2. Lose focus input.onblur = […]

  • [development experience] button monitoring with flutter


    In development, sometimes it is necessary to monitor key events, which is supported by flutter itself and does not need to be implemented in the underlying platform native code. Flutter monitors key events of mobile phone / remote control / keyboard Flutter to achieve key monitoring, direct useRawKeyboardListenerthisWidgetThen: RawKeyboardListener( Focusnode: focusnode(), // focus onKey: (RawKeyEvent […]

  • Enlarge the display effect of JavaScript input box


    requirement: When the user enters content in the input box, the large font box aboveconIt’s bigger Realization idea: Form detects user input: adds keyboard events to the form At the same time, the value in the express bill NovalueGet it and assign it toconBoxinnerTextAs content If the express bill number is empty, the large font […]

  • Comprehensive case of HTML5 form validation beautification


    Events used: Oninput is triggered immediately when the value changes Oninvalid is triggered when validation is not met Although the trigger value of onchange will change, it is not triggered immediately. It can only be triggered when the mouse loses focus Onfocus is triggered when the focus is obtained   design sketch form <span style=”background-color: […]

  • When the focus value is lost, the focus box will be displayed


    Implementation requirements: 1) The input box gets the focus, the prompt content disappears, and the border transition animation changes color2) If the content is empty, the content will be restored and the border will change color; if the content is not empty, only the border transition animation will change color var loginName = document.querySelector (‘input […]