테이블에 표시하려는 개체에 데이터가 있습니다. 불행히도 모든 열에 undefined.
var fifadata = [{
"fields": ["id", "country", "alternate_name", "fifa_code", "group_id", "group_letter", "wins", "draws", "losses", "games_played", "points", "goals_for", "goals_against", "goal_differential"]
}, {
"id": 1,
"country": "Brazil",
"alternate_name": null,
"fifa_code": "BRA",
"group_id": 1,
"group_letter": "A",
"wins": 4,
"draws": 1,
"losses": 2,
"games_played": 7,
"points": 13,
"goals_for": 11,
"goals_against": 14,
"goal_differential": -3
}, {
"id": 2,
"country": "Croatia",
"alternate_name": null,
"fifa_code": "CRO",
"group_id": 1,
"group_letter": "A",
"wins": 1,
"draws": 0,
"losses": 2,
"games_played": 3,
"points": 3,
"goals_for": 6,
"goals_against": 6,
"goal_differential": 0
}, {
"id": 3,
"country": "Mexico",
"alternate_name": null,
"fifa_code": "MEX",
"group_id": 1,
"group_letter": "A",
"wins": 2,
"draws": 1,
"losses": 1,
"games_played": 4,
"points": 7,
"goals_for": 5,
"goals_against": 3,
"goal_differential": 2
}];
var body = document.getElementsByTagName('body')[0];
var table = document.createElement("table");
var thead = document.createElement("thead");
var tbody = document.createElement("tbody");
var th = document.createElement("th");
var caption = document.createElement('caption');
var cap = document.createTextNode("Game Results List");
caption.appendChild(cap);
caption.style.fontWeight = "900";
table.appendChild(caption);
body.appendChild(table);
table.style.border = "1px dashed red";
table.style.borderSpacing = "1px";
table.style.textAlign = "center";
//table head(correct)
for (i = 0; i < 1; i++) {
var tr = document.createElement("tr");
thead.appendChild(tr);
table.appendChild(thead);
for (j = 0; j < fifadata[0].fields.length; j++) {
var th = document.createElement("th");
var keyname = fifadata[0].fields[j];
var tm = document.createTextNode(keyname);
th.appendChild(tm);
tr.appendChild(th);
th.style.border = "1px dashed blue";
th.style.padding = "5px";
}
}
//table body(incorrect).
//I need to use a dynamically created property(i.e. keyinfo) in "var text"
//i.e.fifadata[i].keyinfo; should change into fifadata[1].ID when it is
//excecuted.
for (i = 1; i < fifadata.length; i++) {
var tr = document.createElement("tr");
tbody.appendChild(tr);
table.appendChild(tbody);
for (j = 0; j < fifadata[0].fields.length; j++) {
var td = document.createElement("td");
var keyinfo = fifadata[0].fields[j];
var test = fifadata[i].keyinfo;
var tn = document.createTextNode(test);
td.appendChild(tn);
tr.appendChild(td);
td.style.border = "1px dashed green";
td.style.padding = "2px";
}
}모든 것이 잘되면 JSON 데이터에서 테이블을 만들어야합니다. 내 코드를 약간 수정할 수 있습니까? 더 쉬운 이유가 있습니까?
점 표기법 에서는 이와 같은 변수를 사용할 수 없습니다 . 본질적으로 keyinfo존재하지 않는 라는 속성을 요청 합니다.
var keyinfo = fifadata[0].fields[j];
var test = fifadata[i].keyinfo; // wrong이름이 keyinfo 's value 인 속성에 액세스하려면 다음과 같이 대괄호 표기법 을 사용해야합니다 .
var keyinfo = fifadata[0].fields[j];
var test = fifadata[i][keyinfo]; // right이 간단한 데모를 살펴보십시오.
(function() {
// loading data from a hidden input to declutter the demo script
var fifadata = JSON.parse(document.getElementById("fifadata").value);
var table = document.createElement("table");
var thead = table.appendChild(document.createElement("thead"));
var tbody = table.appendChild(document.createElement("tbody"));
var row = thead.insertRow(-1);
// remove the first item in fifadata and get a reference to its fields property
var fieldNames = fifadata.shift().fields;
// create column headers
fieldNames.forEach(function(fieldName) {
row.appendChild(document.createElement("th")).textContent = fieldName;
});
// populate tbody rows
fifadata.forEach(function(record) {
row = tbody.insertRow(-1);
fieldNames.forEach(function(fieldName) {
// note that we use bracket notation to access the property
row.insertCell(-1).textContent = record[fieldName];
});
});
// add the table to the body once fully constructed
document.body.appendChild(table);
})();<input type="hidden" id="fifadata" value='[{"fields":["id","country","alternate_name","fifa_code","group_id","group_letter","wins","draws","losses","games_played","points","goals_for","goals_against","goal_differential"]},{"id":1,"country":"Brazil","alternate_name":null,"fifa_code":"BRA","group_id":1,"group_letter":"A","wins":4,"draws":1,"losses":2,"games_played":7,"points":13,"goals_for":11,"goals_against":14,"goal_differential":-3},{"id":2,"country":"Croatia","alternate_name":null,"fifa_code":"CRO","group_id":1,"group_letter":"A","wins":1,"draws":0,"losses":2,"games_played":3,"points":3,"goals_for":6,"goals_against":6,"goal_differential":0},{"id":3,"country":"Mexico","alternate_name":null,"fifa_code":"MEX","group_id":1,"group_letter":"A","wins":2,"draws":1,"losses":1,"games_played":4,"points":7,"goals_for":5,"goals_against":3,"goal_differential":2}]'/>참조 : 속성 접근 자 , , , , , 및Array.prototype.forEach()Array.prototype.shift()HTMLTableElement.insertRow()HTMLTableRowElement.insertCell()Node.textContent
이 기사는 인터넷에서 수집됩니다. 재 인쇄 할 때 출처를 알려주십시오.
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