carto/lib/less/tree/alpha.js

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(function (tree) {
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tree.Alpha = function (val) {
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this.value = val;
};
tree.Alpha.prototype = {
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toCSS: function () {
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return "alpha(opacity=" +
(this.value.toCSS ? this.value.toCSS() : this.value) + ")";
},
eval: function () { return this }
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};
})(require('less/tree'));