addeventlistener

来源： https://stackoverflow.com/questions/54067294/how-to-deactivate-dragcontrols-in-three-js

来源： https://stackoverflow.com/questions/56995180/create-event-listener-for-dynamically-created-html-element

来源： https://stackoverflow.com/questions/63601256/illegal-invocation-on-addeventlistener-callxhr-readystatechange-callback

来源： https://stackoverflow.com/questions/63601256/illegal-invocation-on-addeventlistener-callxhr-readystatechange-callback

问题 I am trying to add an event listener but no result came. I know JavaScript has a hoisting feature but I believe I tried all except the correct solution. const cbox = document.querySelectorAll(".box"); function doit() { for (let i = 0; i < cbox.length; i++){ cbox[i].classList.add("red"); } } cbox.addEventListener("click", doit,false); Can somebody spot the mistake I make? 回答1: There are some dissimilarities between the code and the link you have provided. There is no function doit() in there.

问题 I have a simple Cordova project with Angular Framework. I am using https://github.com/auctifera-josed/cordova-plugin-idynamo plugin to communicate with MagTek device. I am listening to the 'magtekEvent' on load of a particular screen to capture the data. Every time I go to other screen and come back to this screen I can see the event is triggering multiple times based on the number of time I visit this screen. I tried removing the event but nothing happened. Can anyone help me on how to stop

问题 I have a form in which I ask users for their input. I will then store the input in the local storage. let shape = { shape: shape, color: shapeColor, dimension: noOfDimension, } arr.push(shape) window.localStorage.setItem("arr", JSON.stringify(arr)) Now I have a button in which when I click on it, a modal pops up and display the shapes stored. The shape data can be retrieved by JSON.parse(localStorage.getItem("arr")) . However the problem is, when I were to add new shape data again, it will

问题 I have a form in which I ask users for their input. I will then store the input in the local storage. let shape = { shape: shape, color: shapeColor, dimension: noOfDimension, } arr.push(shape) window.localStorage.setItem("arr", JSON.stringify(arr)) Now I have a button in which when I click on it, a modal pops up and display the shapes stored. The shape data can be retrieved by JSON.parse(localStorage.getItem("arr")) . However the problem is, when I were to add new shape data again, it will

问题 How can i attach event listener on a radio button in my html? Considering this form: <label> <input name="contract_duration" type="radio" value="6-Months" {{ $contract && $contract->contract_duration === '6-Months' ? 'checked' : '' }} /> <span>6-Months</span> </label> <label> <input name="contract_duration" type="radio" value="1-Year" {{ $contract && $contract->contract_duration === '1-Year' ? 'checked' : '' }} /> <span>1-Year</span> </label> <label> <input name="contract_duration" type=

问题 Trying to create a maze game and im having trouble first getting the arrow keys to connect and two trying to figure out how to find where the player is and make sure they arent able to go through walls const map = [ "WWWWWWWWWWWWWWWWWWWWW", "W W W W W W", "W W W WWW WWWWW W W W", "W W W W W W W", "W WWWWWWW W WWW W W W", "W W W W W", "W WWW WWWWW WWWWW W W", "W W W W W W W", "W WWWWW W W W WWW W F", "S W W W W W W WWW", "WWWWW W W W W W W W W", "W W W W W W W W", "W WWWWWWW WWWWW W W W", "W W