javascript - What is the maximum compression ratio for canvas compressed images?

In a recent project, images were compressed and uploaded, and canvas was used to compress the images. It was found that canvas has different minimum compression ratios for different images. For the largest 22M picture, the smallest one can only be compressed to about 900k, and the compression ratio ...

大家讲道理 2017-06-12 09:28:20 0  1  941

Rewritten title: Adjust browser zoom

I need to create two buttons on my website that can change the browser's zoom level (+) (-). I chose to request browser scaling rather than CSS scaling because of image size and layout issues. Well, is this possible? I've heard different accounts.

P粉674757114 2023-08-20 18:58:29 0  2  512

javascript - Implementation principle of browser zoom size

RT, due to personal usage habits, when using Chrome, the default zoom ratio is adjusted to 90%. When testing some pages today, the style disorder occurred. However, when the zoom ratio is 100%, all browsing The test on the computer is normal, and the test on a low-resolution computer is also normal....

给我你的怀抱 2017-07-05 10:58:28 0  3  1439

React-chartjs-2: Keep y-axis scaling static when zooming

Is there a way to disable the automatic scaling of the y-axis when I scale a time series chart? You can observe the behavior here: https://codesandbox.io/s/react-chartjs-2-line-zoom-pan-9cz0eh When you zoom, the y-axis will scale so that the data takes up all the y-axis space. My zoom plugin looks l...

P粉621033928 2024-01-28 23:46:48 0  1  458

The zoom result is black

Why is the image obtained after scaling according to the source code black and nothing?

Hide on bush 2019-02-21 13:41:46 0  2  1238

javascript - SVG font scaling problem in low version chrome and mobile terminals.

In low-version shell browsers and mobile browsers such as 360 Extreme Speed, the font in the <tspan> tag in svg cannot be scaled correctly, but it is normal in the latest version of Chrome. {Code...} When the window is reduced, the font size in the speed browser will not be reduced whe...

怪我咯 2017-05-16 13:32:50 0  1  703

Scale SVG path and convert using mPdf

Hello, I have a problem with SVG. First, I put the SVG into HTML, with input type radio, the user can scale this SVG (by adding a width style attribute with a percentage value). But when I send it to mpdf (SVGs in JSON) it doesn't work. I then try to calculate the size on the pdf but I can't fit the...

P粉287726308 2023-08-16 17:57:54 0  1  607

javascript - Zooming is disabled on the mobile H5 page, but it can still be zoomed on the browser

Even if <meta name="viewport" content="width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no" /> is added, on the Android platform The page can still be zoomed in the browser

PHP中文网 2017-06-30 09:55:27 0  1  1115

How to completely disable browser gesture zoom functionality on tablets - Stack Overflow

On a tablet, because of the multi-touch function, you can directly use gestures to zoom in and out. However, I currently hope to disable this effect. However, I have tried various methods but it does not seem to work. Moreover, this zoom is the same as the PC CTRL + scroll wheel zoom. It’s not just ...

怪我咯 2017-06-30 09:57:23 0  1  1075

javascript - Will the mobile browser have a default viewport, which will display the page on the mobile screen after zooming?

The mobile browser will have a default viewport view, which defaults the width of the page we wrote to 980px, and zooms and fills it into the mobile browser. How many times is the zoom here?

过去多啦不再A梦 2017-05-16 13:43:30 0  2  481

javascript - Echarts controls the zoom of multiple images at the same time

There are multiple line charts on the page as shown below. Now each chart can be zoomed by using the mouse wheel or dragging the slider below. How can I drag one of them so that all the charts change?

高洛峰 2017-06-12 09:25:29 0  1  689

javascript - When scaling an element, only the enlarged lower right content can be seen by scrolling.

{Code...} The zoomed content in the upper left corner cannot be seen. In addition to setting transfrom-origin to left top, is there any other way?

天蓬老师 2017-05-17 09:56:07 0  2  923

Font scaling based on container size

I'm having a hard time understanding the font scaling issue. I currently have a website with a body text font-size of 100%. 100% but what? This seems to be calculated at 16 pixels. I was 100% under the impression that it was somehow referring to the size of the browser window, but apparently not, si...

P粉217784586 2023-10-08 21:42:41 0  2  727

Despite using rem, why does the element size change when I zoom in or out?

I'm implementing a project where I put a button in the input using the CSSposition property and everything works fine, even if I'm in responsive mode there's no problem, coincidentally I want to zoom - inspecting something, I realize that when I zoom in or out There will be a gap between the top or ...

P粉729198207 2023-09-08 15:06:21 0  1  536

I followed the steps, but when I zoom in and out, the drop-down doesn't appear when I click the button.

I followed the steps, but when I zoom in and out, the drop-down doesn’t appear when I click the button.

千里同**络科技**** 2020-08-02 17:50:48 0  0  2481

Implement adaptive zoom positioning of videos on mobile devices

I have the following code: https://codesandbox.io/s/cool-sunset-pe8pgh?file=/src/styles.css I want to scale the video on mobile devices without losing any video elements, how can I achieve this?

P粉729436537 2023-09-16 18:12:58 0  1  627

Why did the teaching video playback interface suddenly change, with the chapters reduced to the right? The most important thing is that there is no fast playback option?

Why did the teaching video playback interface suddenly change, with the chapters reduced to the right? The most important thing is that there is no fast playback option? Help! ! !

伽蓝雨 2017-12-21 22:16:34 0  0  1070

javascript - Is there any simple js that can be used to zoom in and out by clicking on the image?

I want to use a js that can zoom in and out of images in html. It is best to use two kinds of images, one big image and one small image. Is there a simpler image sharing function for the mall's comments? I don't know.

習慣沉默 2017-05-19 10:47:30 0  2  740

Vuetify v-menu dropdown is displayed in incorrect position when using css scale property

As shown in the attached image, the v menu position is in the wrong place when using the scale CSS property. Corresponding codepen: https://codepen.io/satishvarada/pen/YzjGNVZ Similar problems will occur when using the v-autocomplete component. newVue({el:'#app',vuetify:newVuetify(),data:()=>({it...

P粉983021177 2024-03-19 18:55:15 0  1  366

Use mouse wheel for page zoom, click and drag to pan the page

How to create scrolling and panning effects for the entire page using the mouse wheel? Basically just like any 2D editor, scroll to zoom and click and drag to pan, but for the entire body. I can't find any information about it online.

P粉308783585 2024-03-26 14:11:27 0  1  316