H5&CSS Basic —— 051. Calculating 1rem Pixel Values in JS (Not translated)
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001. Free HTTPS Certificate
002. About The Column
003. Visible Area of Browser
004. Why ReactJs
005. Prohibit mobile scaling
006. EM in H5
007. Space width in page
008. H5 Special Characters
009. H5 Restricting Input
010. H5 Font
011. nginx redirection configuration
012. Text Indentation
013. Flex Layout
014. Gradient Borders
015. Common DOM Operations
016. Media Query
017. CSS Selectors
018. CSS alternate lines color
019. fetch
020. JS Attributes Operation
021. scroll div
022. JS for Loop
023. Prohibit Text Selection
024. Precision Controled Float Output
025. Ionic Full Screen
026. SVG Circle
027. SVG Ellipse
028. SVG Arc
029. SVG Elliptical Sector
030. Using WebAssembly
031. JS Checklist checkbox Operation
032. SVG Bezier Curve
033. Threejs Material
034. Luminous Image Styles
035. Web Animation Points
036. CSS Gradient Fonts
037. SVG Rectangle
038. Development Ability for Remuneration
039. Close Browser Default Style for Input
040. Jet Tail Particle Animation
041. Prohibit Desktop Browser Scaling JS
042. Desktop Full Screen Web CSS
043. Display images in self scaling aspect ratio div
044. Bi-side Text Alignment Styles
045. Single line ellipsis
046. Multi-line ellipsis
047. Font Transformation Styles
048. Remove default style of a tag
049. Chinese Characters: Full Width Space
050. DIV lays on DIV
051. Calculating 1rem Pixel Values in JS
052. JS Operations of DOM Parent Nodes and Adjacent Nodes
053. Absolute Coordinates of DOM Elements in JS
054. ToolTips Div
055. Height and Width in JS
056. Nginx configuration for stream media
057. Scroll Bar Style
058. Common Methods for JS Array Operations
059. SVG Fill Style Definition
060. SVG Stroke Style Definition
061. SVG Drawing Lines
062. CSS Background Images Splicing
063. WebSocket
064. JS Calculate DPI
065. GIF Opacity or not
066. Nginx solved CORS problem
067. Look At JsonP before publish
068. Center and Middle Content in Div
069. CSS background image size keeping ratio
070. CSS Frame Animation
071. CSS Same Width Font Display
072. Package

    function getComputed1RemPxes(){
        return parseFloat(getComputedStyle(document.documentElement).fontSize);
    }

    关键函数：getComputedStyle，关键属性：fontSize
    
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