use constructor bound methods for pagination

src/components/Pagination/Pagination.jsx

@@ -21,6 +21,15 @@ class Pagination extends Component {
     const { page } = this.props;
 
     this.state = { value: page, isOpen: false };
+
+    this.onPageChange = this.onPageChange.bind(this);
+    this.onSubmit = this.onSubmit.bind(this);
+    this.onFirst = this.onFirst.bind(this);
+    this.onPrevious = this.onPrevious.bind(this);
+    this.onNext = this.onNext.bind(this);
+    this.onLast = this.onLast.bind(this);
+    this.onTogglePageSize = this.onTogglePageSize.bind(this);
+    this.onSelectPageSize = this.onSelectPageSize.bind(this);
   }
 
   componentDidUpdate (prevProps) {
@@ -31,11 +40,11 @@ class Pagination extends Component {
     }
   }
 
-  onPageChange = value => {
+  onPageChange (value) {
     this.setState({ value });
-  };
+  }
 
-  onSubmit = event => {
+  onSubmit (event) {
     const { onSetPage, page, pageCount, page_size } = this.props;
     const { value } = this.state;
 
@@ -49,43 +58,43 @@ class Pagination extends Component {
     } else {
       this.setState({ value: page });
     }
-  };
+  }
 
-  onFirst = () => {
+  onFirst () {
     const { onSetPage, page_size } = this.props;
 
     onSetPage(1, page_size);
-  };
+  }
 
-  onPrevious = () => {
+  onPrevious () {
     const { onSetPage, page, page_size } = this.props;
     const previousPage = page - 1;
 
     if (previousPage >= 1) {
       onSetPage(previousPage, page_size);
     }
-  };
+  }
 
-  onNext = () => {
+  onNext () {
     const { onSetPage, page, pageCount, page_size } = this.props;
     const nextPage = page + 1;
 
     if (nextPage <= pageCount) {
       onSetPage(nextPage, page_size);
     }
-  };
+  }
 
-  onLast = () => {
+  onLast () {
     const { onSetPage, pageCount, page_size } = this.props;
 
     onSetPage(pageCount, page_size)
-  };
+  }
 
-  onTogglePageSize = isOpen => {
+  onTogglePageSize (isOpen) {
     this.setState({ isOpen });
-  };
+  }
 
-  onSelectPageSize = ({ target }) => {
+  onSelectPageSize ({ target }) {
     const { onSetPage } = this.props;
 
     const page = 1;
@@ -94,7 +103,7 @@ class Pagination extends Component {
     this.setState({ isOpen: false });
 
     onSetPage(page, page_size);
-  };
+  }
 
   render () {
     const { up } = DropdownDirection;