Missed parentheses for matchMeida parameter

https://developer.mozilla.org/en-US/docs/Web/API/Window/matchMedia
9 years ago · d96fa05c6c
1 changed files with 1 additions and 1 deletions
--- a/docs/12-context.md
+++ b/docs/12-context.md
@ -177,7 +177,7 @@ var MediaQuery = React.createClass({
  },
  componentDidMount: function(){
    var checkMediaQuery = function(){
-      var type = window.matchMedia("min-width: 1025px").matches ? 'desktop' : 'mobile';
+      var type = window.matchMedia("(min-width: 1025px)").matches ? 'desktop' : 'mobile';
      if (type !== this.state.type){
        this.setState({type:type}); 
      }