質問編集履歴
3
LocalStorageによる二重投票防止部分を省略しました
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test
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</body>
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<script>
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$('.question-btn').click(function(){
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var isVote = getLocalStorage();
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console.log(isVote);
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if(isVote != null){
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alert('すでに投票済みです。');
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return;
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}
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var form1 = document.forms['question-form'];
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var ans = $(this).val();
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$('#hidden-btn').val(ans);
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form1.submit();
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setLocalStorage();
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return false;
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});
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drawChart();
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})
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※省略
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※以下省略
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var getLocalStorage = function(){
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return JSON.parse(localStorage.getItem('isVote'));
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}
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var setLocalStorage = function(){
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var isVote = JSON.stringify('voted');
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localStorage.setItem('isVote', isVote);
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alert('投票しました。');
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}
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var deleteLocalStorage = function(){
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localStorage.removeItem('isVote');
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alert('ストレージ（isVote）を削除しました。');
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}
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</script>
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</html>
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```
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2
結果表示の部分を省略しました
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test
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<html lang="ja">
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<head>
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</head>
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<body>
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<button class="question-btn" value="1">賛成</button>
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1
何か所か省略しました
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test
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@@ -152,16 +152,6 @@
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<title></title>
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<script src="../js/jquery-3.4.1.min.js"></script>
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<script src="//cdn.jsdelivr.net/npm/chart.js@2.8.0/dist/Chart.min.js"></script>
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</head>
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<body>
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var
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var getLocalStorage = function(){
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var matchNum = 0;
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for(var i = 0; i < array.length; i++){
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if(array[i] === 0){
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matchNum++;
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}
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}
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if(array.length === matchNum ){
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$('#myChart').hide();
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$('#noChart').show();
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} else {
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$('#myChart').show();
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$('#noChart').hide();
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}
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return JSON.parse(localStorage.getItem('isVote'));
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var myChart = new Chart(ctx, {
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type: 'pie',
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data: {
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labels: ["賛成", "反対", "どちらともいえない"],
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datasets: [{
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label: 'アンケート',
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data: array,
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backgroundColor: [
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'rgba(255, 99, 132, 0.7)',
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'rgba(54, 162, 235, 0.7)',
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'rgba(255, 206, 86, 0.7)',
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],
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}]
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}
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});
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}
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var setLocalStorage = function(){
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var isVote = JSON.stringify('voted');
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localStorage.setItem('isVote', isVote);
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alert('投票しました。');
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}
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var
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var deleteLocalStorage = function(){
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localStorage.
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localStorage.removeItem('isVote');
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alert('
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alert('ストレージ（isVote）を削除しました。');
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}
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var deleteLocalStorage = function(){
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localStorage.removeItem('isVote');
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alert('ストレージ（isVote）を削除しました。');
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}
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</script>
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</html>
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