Vendor Prefixes

CSS vendor prefixes, also sometimes known as or CSS browser prefixes, are a way for browser makers to add support for new CSS features before those features are fully supported in all browsers.

Using a tool like an online tool like autoprefixer can determine what prefixes need to be added. Example:

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.example {
    flex-grow:1;
}

// recommended to be
.example {
    -webkit-box-flex:1;
    -ms-flex-positive:1;
    flex-grow:1;
}

This is using recommendations from [https://caniuse.com/#search=CSS%20Flexible%20Box%20Layout%20Module](https://caniuse.com/#search=CSS Flexible Box Layout Module)

Prefix Browser Relationship

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-ms                ~ IE
-webkit            ~ Chrome, Safari
-moz               ~ Firefox

References