event-handling

问题 I need to run a script every time a table is resized (whenever the user resizes the browser window). Does anyone know how this can be done? 回答1: function myFunction() { alert('resized'); } window.onresize = myFunction; 回答2: window.onresize = function(){alert('test');} 回答3: If you use Jquery, $(window).resize(function() { alert("test now"); }); 来源： https://stackoverflow.com/questions/2733533/how-can-i-run-a-javascript-function-every-time-an-html-element-is-resized

问题 I have a number input tag on which I have two event listeners 'on-click' and 'on-change'. When I am click on arrow it triggers both. I would like to have one whichever triggers first without removing any of the event listeners. On clicking rapidly change event doesn't trigger until it looses focus from input tag(If I keep only change event). If I keep only click event then I won't be able to capture change event. <input type="number" @click="function()" @change="function()" /> 回答1: Use

问题 I have an application that runs continuously, it creates and destroys classes some of which have events like mouse click events and the like... First question is what is the proper way to unsubscribe? If the subscribe looks like this: Panel1.MouseClick += new MouseEventHandler(Action_MouseClick); is it proper to unsubscribe like this: Panel1.MouseClick -= new MouseEventHandler(Action_MouseClick); OR is it ok to do this: Panel1.MouseClick -= Action_MouseClick; or is either way ok? My other

问题 I have an application that runs continuously, it creates and destroys classes some of which have events like mouse click events and the like... First question is what is the proper way to unsubscribe? If the subscribe looks like this: Panel1.MouseClick += new MouseEventHandler(Action_MouseClick); is it proper to unsubscribe like this: Panel1.MouseClick -= new MouseEventHandler(Action_MouseClick); OR is it ok to do this: Panel1.MouseClick -= Action_MouseClick; or is either way ok? My other

问题 I'm trying to create a class of draggable lines using matplotlib handling and picking. The aim is to set different thresholds and intervals on a graph. Here is the code: import matplotlib.pyplot as plt import matplotlib.lines as lines import numpy as np class draggable_lines: def __init__(self, ax, kind, XorY): self.ax = ax self.c = ax.get_figure().canvas self.o = kind self.XorY = XorY if kind == "h": x = [-1, 1] y = [XorY, XorY] elif kind == "v": x = [XorY, XorY] y = [-1, 1] else: print(

问题 I'm trying to create a class of draggable lines using matplotlib handling and picking. The aim is to set different thresholds and intervals on a graph. Here is the code: import matplotlib.pyplot as plt import matplotlib.lines as lines import numpy as np class draggable_lines: def __init__(self, ax, kind, XorY): self.ax = ax self.c = ax.get_figure().canvas self.o = kind self.XorY = XorY if kind == "h": x = [-1, 1] y = [XorY, XorY] elif kind == "v": x = [XorY, XorY] y = [-1, 1] else: print(

问题 I'm trying to create a class of draggable lines using matplotlib handling and picking. The aim is to set different thresholds and intervals on a graph. Here is the code: import matplotlib.pyplot as plt import matplotlib.lines as lines import numpy as np class draggable_lines: def __init__(self, ax, kind, XorY): self.ax = ax self.c = ax.get_figure().canvas self.o = kind self.XorY = XorY if kind == "h": x = [-1, 1] y = [XorY, XorY] elif kind == "v": x = [XorY, XorY] y = [-1, 1] else: print(

问题 In C# Is there a fundamental difference between using event EventHandler<myeventargs> and EventHandler<myeventargs> As they both produce the same effect from what I can see apart from using the event keyword gives you a different icon in intellisense. 回答1: They seems to be alike, but really different. With event keyword, you are making them something like properties, which means you can register them in public, while maintain a private back-end . However, without event keyword, it's just a

问题 I am able to add events fine. addEventListener("onStateChange", "handleStateChange"); but when trying to remove the event, it does not. removeEventListener("onStateChange", "handleStateChange"); handleStateChange is still being called whenever I pause/play the video. Has anyone run into this and have a solution? or is there a bug on the API? 回答1: I think the issue is that the player object of the YouTube API has no removeEventListener method. Keep in mind that when you call addEventListener ,

问题 Consider the following code (from a performance report): This is part of a property notificiation listener component. The method OnItemPropertyChanged is a private instance-bound method with the PropertyChangedEventHandler signature. This method is called around 100.000 times and is causing significant delays in the application. Are there performance considerations related to (un)subscribing events? Is there an explanation to why this would cause such a performance hit? 回答1: The first thing