这是javascript代码：
/**
* Created by Alejandro on 25/02/2016.
*/
var aantalKoppels = 2;
function setup(){
var btnToevoegen = document.getElementById("btnToevoegen");
btnToevoegen.addEventListener("click", koppelToevoegen);
var btnReplace = document.getElementById("btnReplace");
btnReplace.addEventListener("click", update);
}
function koppelToevoegen() {
var parameterDataKoppel = document.createElement("div");
var labelParameter = document.createElement("label");
labelParameter.innerHTML = "Parameter:";
labelParameter.setAttribute("for", "parameter" + aantalKoppels);
var parameter = document.createElement("input");
parameter.id = "parameter" + aantalKoppels;
parameter.setAttribute("type", "text");
var labelData = document.createElement("label");
labelData.innerHTML = "Data:";
labelData.setAttribute("for", "data" + aantalKoppels);
var data = document.createElement("input");
data.id = "data" + aantalKoppels;
data.setAttribute("type", "text");
parameterDataKoppel.appendChild(labelParameter);
parameterDataKoppel.appendChild(parameter);
parameterDataKoppel.appendChild(labelData);
parameterDataKoppel.appendChild(data);
var parameterDataKoppels = document.getElementById("parameterDataKoppels");
parameterDataKoppels.appendChild(parameterDataKoppel);
aantalKoppels++;
}
function update() {
var parameterDataKoppels = [];
var rangnummerKoppel = 1;
for(var i = 0; i < aantalKoppels - 1; i++) {
var parameter = (document.getElementById("parameter" + rangnummerKoppel)).value;
var data = (document.getElementById("data" + rangnummerKoppel)).value;
parameterDataKoppels[i] = [parameter.trim(), data.trim()];
rangnummerKoppel++;
}
var template = document.getElementById("template");
vervangAlles(template, parameterDataKoppels);
}
function vervangAlles(template, parameterDataKoppels) {
for(var i = 0; i < parameterDataKoppels.length; i++) {
var result = vervang(template, parameterDataKoppels[i][0], parameterDataKoppels[i][1]);
template = result;
}
var output = document.getElementById("txtOutput");
output.innerHTML = template;
return template;
}
function vervang(template, parameter, data) {
var result = template.substring(0, template.indexOf(parameter)) + data;
var i = template.indexOf(parameter) + parameter.length;
while(template.indexOf(parameter, i) !== -1) {
var indexVolgende = template.indexOf(parameter, i);
result += (template.substring(i, indexVolgende)) + data;
i = indexVolgende + parameter.length;
}
result += template.substring(i, template.length);
return result;
}
window.addEventListener("load",setup,false);
此代码应采用模板（字符串），参数（文本中的字符串词）和数据（字符串）作为输入，然后用字符串数据替换文本中的所有参数。我确实收到一个错误，但在最后一个函数的第一行中找不到：
未捕获的TypeError：template.indexOf不是函数vervang @ ReplaceFunction.js：61vervangAlles @ ReplaceFunction.js：52update @ ReplaceFunction.js：47
这是html代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<script type="text/javascript" charset="utf-8" src="../scripts/ReplaceFunction.js"></script>
<title>ReplaceFunction</title>
</head>
<body>
<div>
<label for="template">Template:</label>
<input id="template" type="text" />
</div>
<div id="parameterDataKoppels">
<div>
<label for="parameter1">Parameter:</label>
<input id="parameter1" type="text" />
<label for="data1">Data:</label>
<input id="data1" type="text" />
</div>
</div>
<input id="btnToevoegen" type="button" value="Koppel toevoegen" />
<input id="btnReplace" type="button" value="Replace" />
<p id="txtOutput">geen output</p>
</body>
</html>
我希望有人知道为什么会出现此错误。
最佳答案
看来您的“更新”应该是
function update() {
var parameterDataKoppels = [];
var rangnummerKoppel = 1;
for(var i = 0; i < aantalKoppels - 1; i++) {
var parameter = (document.getElementById("parameter" + rangnummerKoppel)).value;
var data = (document.getElementById("data" + rangnummerKoppel)).value;
parameterDataKoppels[i] = [parameter.trim(), data.trim()];
rangnummerKoppel++;
}
//var template = document.getElementById("template");
var template = document.getElementById("template").value;
vervangAlles(template, parameterDataKoppels);
}