@femessage/img-preview v1.5.0

img-preview

Picture preview component

中文文档

Table of Contents

• Feature
• Demo
• Install
• Picture Preview Algorithm
• License

Feature

• Implementation like medium
• Automatically adaptation screen size
• The small picture is not vague, the big picture does not overflow the screen
• Support Press ESC Key to off preview

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Demo

• Doc and online demo

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Install

yarn add @femessage/img-preview

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Picture Preview Algorithm

When the original size of the preview picture is relatively large, you need to preview the picture proportionally.

// X-axis ratio = width of the window / width of the image
// Y-axis ratio = height of the window / height of the picture
// Image ratio = x-axis ratio * (picture height > window height ? y-axis ratio: x-axis ratio)

Here's more details of the formula:

• Step 1, calculation x-axis ratio (The ratio of the browser window width to the original width of the picture) and save it

• The second step, considering x-axis ratio below, it is possible that the height of the picture is larger than the height of the window. At this time should use y-axis ratio (The ratio of browser window height to the original height of the picture) as the preview ratio of the picture

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Contributors

Thanks goes to these wonderful people ( Emoji key ):This project follows All-contributors Specification. Contributions of any kind welcome!

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License

MIT

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