flow like the river

BACK_BACK/node_modules/postcss-minify-gradients/LICENSE-MIT

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+Copyright (c) Ben Briggs <beneb.info@gmail.com> (http://beneb.info)
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.

BACK_BACK/node_modules/postcss-minify-gradients/README.md

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+# [postcss][postcss]-minify-gradients
+
+> Minify gradient parameters with PostCSS.
+
+## Install
+
+With [npm](https://npmjs.org/package/postcss-minify-gradients) do:
+
+```
+npm install postcss-minify-gradients
+```
+
+
+## Example
+
+Where possible, this module will minify gradient parameters. It can convert
+linear gradient directional syntax to angles, remove the unnecessary `0%` and
+`100%` start and end values, and minimise color stops that use the same length
+values (the browser will adjust the value automatically).
+
+### Input
+
+```css
+h1 {
+    background: linear-gradient(to bottom, #ffe500 0%, #ffe500 50%, #121 50%, #121 100%)
+}
+```
+
+### Output
+
+```css
+h1 {
+    background: linear-gradient(180deg, #ffe500, #ffe500 50%, #121 0, #121)
+}
+```
+
+
+## Usage
+
+See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for
+examples for your environment.
+
+
+## Contributors
+
+See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md).
+
+
+## License
+
+MIT © [Ben Briggs](http://beneb.info)
+
+[postcss]: https://github.com/postcss/postcss

BACK_BACK/node_modules/postcss-minify-gradients/dist/index.js

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+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+
+var _postcss = require('postcss');
+
+var _postcss2 = _interopRequireDefault(_postcss);
+
+var _postcssValueParser = require('postcss-value-parser');
+
+var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);
+
+var _cssnanoUtilGetArguments = require('cssnano-util-get-arguments');
+
+var _cssnanoUtilGetArguments2 = _interopRequireDefault(_cssnanoUtilGetArguments);
+
+var _isColorStop = require('is-color-stop');
+
+var _isColorStop2 = _interopRequireDefault(_isColorStop);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+const angles = {
+    top: '0deg',
+    right: '90deg',
+    bottom: '180deg',
+    left: '270deg'
+};
+
+function isLessThan(a, b) {
+    return a.unit.toLowerCase() === b.unit.toLowerCase() && parseFloat(a.number) >= parseFloat(b.number);
+}
+
+function optimise(decl) {
+    const value = decl.value;
+
+    if (!~value.toLowerCase().indexOf('gradient')) {
+        return;
+    }
+
+    decl.value = (0, _postcssValueParser2.default)(value).walk(node => {
+        if (node.type !== 'function' || !node.nodes.length) {
+            return false;
+        }
+
+        const lowerCasedValue = node.value.toLowerCase();
+
+        if (lowerCasedValue === 'linear-gradient' || lowerCasedValue === 'repeating-linear-gradient' || lowerCasedValue === '-webkit-linear-gradient' || lowerCasedValue === '-webkit-repeating-linear-gradient') {
+            let args = (0, _cssnanoUtilGetArguments2.default)(node);
+
+            if (node.nodes[0].value.toLowerCase() === 'to' && args[0].length === 3) {
+                node.nodes = node.nodes.slice(2);
+                node.nodes[0].value = angles[node.nodes[0].value.toLowerCase()];
+            }
+
+            let lastStop = null;
+
+            args.forEach((arg, index) => {
+                if (!arg[2]) {
+                    return;
+                }
+
+                let isFinalStop = index === args.length - 1;
+                let thisStop = (0, _postcssValueParser.unit)(arg[2].value);
+
+                if (lastStop === null) {
+                    lastStop = thisStop;
+
+                    if (!isFinalStop && lastStop && lastStop.number === '0' && lastStop.unit.toLowerCase() !== 'deg') {
+                        arg[1].value = arg[2].value = '';
+                    }
+
+                    return;
+                }
+
+                if (lastStop && thisStop && isLessThan(lastStop, thisStop)) {
+                    arg[2].value = 0;
+                }
+
+                lastStop = thisStop;
+
+                if (isFinalStop && arg[2].value === '100%') {
+                    arg[1].value = arg[2].value = '';
+                }
+            });
+
+            return false;
+        }
+
+        if (lowerCasedValue === 'radial-gradient' || lowerCasedValue === 'repeating-radial-gradient') {
+            let args = (0, _cssnanoUtilGetArguments2.default)(node);
+            let lastStop;
+
+            const hasAt = args[0].find(n => n.value.toLowerCase() === 'at');
+
+            args.forEach((arg, index) => {
+                if (!arg[2] || !index && hasAt) {
+                    return;
+                }
+
+                let thisStop = (0, _postcssValueParser.unit)(arg[2].value);
+
+                if (!lastStop) {
+                    lastStop = thisStop;
+
+                    return;
+                }
+
+                if (lastStop && thisStop && isLessThan(lastStop, thisStop)) {
+                    arg[2].value = 0;
+                }
+
+                lastStop = thisStop;
+            });
+
+            return false;
+        }
+
+        if (lowerCasedValue === '-webkit-radial-gradient' || lowerCasedValue === '-webkit-repeating-radial-gradient') {
+            let args = (0, _cssnanoUtilGetArguments2.default)(node);
+            let lastStop;
+
+            args.forEach(arg => {
+                let color;
+                let stop;
+
+                if (arg[2] !== undefined) {
+                    if (arg[0].type === 'function') {
+                        color = `${arg[0].value}(${(0, _postcssValueParser.stringify)(arg[0].nodes)})`;
+                    } else {
+                        color = arg[0].value;
+                    }
+
+                    if (arg[2].type === 'function') {
+                        stop = `${arg[2].value}(${(0, _postcssValueParser.stringify)(arg[2].nodes)})`;
+                    } else {
+                        stop = arg[2].value;
+                    }
+                } else {
+                    if (arg[0].type === 'function') {
+                        color = `${arg[0].value}(${(0, _postcssValueParser.stringify)(arg[0].nodes)})`;
+                    }
+
+                    color = arg[0].value;
+                }
+
+                color = color.toLowerCase();
+
+                const colorStop = stop || stop === 0 ? (0, _isColorStop2.default)(color, stop.toLowerCase()) : (0, _isColorStop2.default)(color);
+
+                if (!colorStop || !arg[2]) {
+                    return;
+                }
+
+                let thisStop = (0, _postcssValueParser.unit)(arg[2].value);
+
+                if (!lastStop) {
+                    lastStop = thisStop;
+
+                    return;
+                }
+
+                if (lastStop && thisStop && isLessThan(lastStop, thisStop)) {
+                    arg[2].value = 0;
+                }
+
+                lastStop = thisStop;
+            });
+
+            return false;
+        }
+    }).toString();
+}
+
+exports.default = _postcss2.default.plugin('postcss-minify-gradients', () => {
+    return css => css.walkDecls(optimise);
+});
+module.exports = exports['default'];

BACK_BACK/node_modules/postcss-minify-gradients/package.json

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+{
+  "name": "postcss-minify-gradients",
+  "version": "4.0.2",
+  "description": "Minify gradient parameters with PostCSS.",
+  "main": "dist/index.js",
+  "scripts": {
+    "prepublish": "cross-env BABEL_ENV=publish babel src --out-dir dist --ignore /__tests__/"
+  },
+  "files": [
+    "LICENSE-MIT",
+    "dist"
+  ],
+  "keywords": [
+    "css",
+    "postcss",
+    "postcss-plugin"
+  ],
+  "license": "MIT",
+  "devDependencies": {
+    "babel-cli": "^6.0.0",
+    "cross-env": "^5.0.0"
+  },
+  "homepage": "https://github.com/cssnano/cssnano",
+  "author": {
+    "name": "Ben Briggs",
+    "email": "beneb.info@gmail.com",
+    "url": "http://beneb.info"
+  },
+  "repository": "cssnano/cssnano",
+  "dependencies": {
+    "cssnano-util-get-arguments": "^4.0.0",
+    "is-color-stop": "^1.0.0",
+    "postcss": "^7.0.0",
+    "postcss-value-parser": "^3.0.0"
+  },
+  "bugs": {
+    "url": "https://github.com/cssnano/cssnano/issues"
+  },
+  "engines": {
+    "node": ">=6.9.0"
+  }
+}