dom-events

问题 How to disable the up arrow key when a button is focused and enable it when the button is not focused in angular2? For example: In html: <button type="button" (focus)="disableUpArrowKey()"> In script: disableUpArrowKey(){ //?? } 回答1: Bind on keydown and call preventDefault of event. html: <button (keydown)="onKeydown($event)">Button</button> ts: ... onKeydown(event: KeyboardEvent) { if (event.key === 'ArrowUp') { event.preventDefault() } } ... stackblitz : https://stackblitz.com/edit/angular

问题 I've had several occasions in my selenium tests where I decided to use Selenium's click_and_hold() (source code here) method on some element. The source code makes it look like it will stay pressed indefinitely but there are definitely some actions, such as a simple click, that cause the held click to be released. Obviously calling release will release the held click too, but does anyone have a grasp on exactly what actions/conditions (either from the script or the page itself) will cause the

问题 I have a problem with my HTML Table. I want my spreadsheet data to be displayed there. I don't know what did I missed. This is my Code.GS: function getTableData(){ var url3 = "https://docs.google.com/spreadsheets/d/xxxxxxxxxx/edit#gid=0"; var ss3 = SpreadsheetApp.openByUrl(url3); var ws3 = ss3.getSheetByName("Time"); var data = ws3.getRange(2,2,ws3.getLastRow()-1,10).getValues(); //Logger.log(data); return data; } This is my Script: <script> var data = [ [1, "Jack",55], [1, "Jack",55], [1,

问题 I have (an array of) two inputs product and category . The product one is an autocomplete. I would like to fill in the category when a product is selected. the problem that the event.target is not a jquery object, so it seems I can't apply the jQquery's .next("input") Here is my code: var addedProduct = $(".produit:last > input"); addedProduct.autocomplete( { source: Object.keys(availableProducts), select: function(event, ui){ var category = event.target.next("input"); // something like this

问题 Let's say I have a simple code like: <ListItem button={true} > <Typography variant='caption' color='primary'> {value} </Typography> <Button onClick={foo} > Button </Button> </ListItem> When I click anything inside the ListItem the ripple effect is trigger, which is ok, but when I click the button I don't want the ripple effect of the parent component to be triggered. How do I do that? 回答1: You can try to use disableRipple property of ListItem . Set it to true when clicking on button and set

问题 I am using mouse wheel zoom in my d3 Map.Following Code am using. .on("wheel.zoom", function() { var currScale = projection41039.scale(); var newScale = currScale - 1 * event.deltaY; if (newScale >= 150) { var currTranslate = projection41039.translate(); var coords = projection41039.invert([event.offsetX, event.offsetY]); projection41039.scale(newScale); var newPos = projection41039(coords); projection41039.translate([currTranslate[0] + (event.offsetX - newPos[0]), currTranslate[1] + (event

问题 I'm having a bit of issue with events in prototype. I'm trying to bind and fire the native events: onhashchange , and onpopstate . As well as my custom events: statechange and anchorchange . All these events are for the window element. Here's the code I've already tried with no luck: Element.observe(window,eventName,eventHandler); Element.fire(window,eventName); Any help would be appreciated. 回答1: You can only use fire for custom events. Take a look at this question/answer. I think it solves

问题 How can I show or hide markers of different groups (Let's say Bars/Cinemas/Parking) , by clicking on a HTML element (a Checkbox in this case)? my markers are generated into an array from a loop, like this: markers[i] = new google.maps.Marker({ numero : i, position: latLng, map: map, info: data.Description, group: data.category, }); I think I should use : An onclick on my HTML element, with a Js function. This Js function should contain this Gmaps Method setVisible Like this: google.maps.event

问题 I want to trigger events from a Firefox extension, specifically click events. I've tried jQuery's .click() as well as the whole: var evt = document.createEvent("HTMLEvents"); evt.initEvent("click", true, false ); toClick[0].dispatchEvent(evt); This is not working for me, and I was wondering if this is even possible? (to trigger events from a Firefox extension)? I think it may have something to do with what document I create the event on...but I'm not sure. If so, how does one do it? 回答1:

问题 I'm using this to disable the 'scrolling' effect the spacebar has in a browser. Will this affect other keypress events too? window.onkeydown = function(e) { return !(e.keyCode == 32); }; Could someone please explain what this is doing? I'm not sure if this code is bad, but it seems to disable other keypress related codes in my page, and I want to make sure this isn't the reason. Thanks! 回答1: ASCII code 32 is the ASCII value that represents the spacebar key, and your code is essentially