Javascript 如何保存和显示用户输入
我正在尝试获取用户输入(债务),保存到本地存储,并将用户输入显示到结果的div(results)中。当我点击提交按钮时,什么也没发生。我希望它做的是将输入推送到数组,然后将其发布到results div HTML: 我希望所有的输入都作为一个对象放入数组中Javascript 如何保存和显示用户输入,javascript,arrays,local-storage,Javascript,Arrays,Local Storage,我正在尝试获取用户输入(债务),保存到本地存储,并将用户输入显示到结果的div(results)中。当我点击提交按钮时,什么也没发生。我希望它做的是将输入推送到数组,然后将其发布到results div HTML: 我希望所有的输入都作为一个对象放入数组中 var debtObject = { name: debtName, amount: debtAmount, due: debtDue } 这就是我认为主要问题所在,我不认为输入被推入数组 /
var debtObject = {
name: debtName,
amount: debtAmount,
due: debtDue
}
这就是我认为主要问题所在,我不认为输入被推入数组
// Test if debts is null
if(localStorage.getItem('debts') === null) {
// Init array
var debts = [];
// Add to array
debts.push(debtObject);
// Set to localStorage
localStorage.setItem('debts', JSON.stringify(debts));
} else {
// Get debts from localStorage
var debts = JSON.parse(localStorage.getItem('debts'));
// Add debt to array
debts.push(debtObject);
// Re-set back to localStorage
localStorage.setItem('debts', JSON.stringify(debts));
}
// Clear form
document.getElementById('myForm').reset();
// Re-fetch debts
fetchDebts();
// Prevent form from submitting
e.preventDefault();
}
这是将结果打印到结果div的函数
// Fetch debts
function fetchDebts() {
// Get debts from localStorage
var debts = JSON.parse(localStorage.getItem('debts'));
// Get output id
var results = document.getElementById('results');
// Build output
results.innerHTML = '';
for( var i = 0; i < debts.length; i++) {
var name = debts[i].name;
var amount = debts[i].amount;
var due = debts[i].due;
results.innerHTML += '<div class="well">'+
'<p>' + 'Name: ' + name +
'Amount: ' + amount +
'Due: ' + due +
'</h3>'+
'</div>';
}
}
// Validate Form
function validateForm(debtName, debtAmount, debtDue) {
if(!debtName || !debtAmount || !debtDue) {
alert('Please fill in the form');
return false;
}
return true;
}
// modal end
//取债
函数{
//从本地存储获取债务
var debtes=JSON.parse(localStorage.getItem('debtes');
//获取输出id
var results=document.getElementById('results');
//构建输出
results.innerHTML='';
对于(变量i=0;i<0.length;i++){
var name=债务[i]。名称;
var金额=债务[i]。金额;
到期风险价值=债务[i]。到期;
results.innerHTML+=“”+
“”+“名称:”+名称+
“金额:”+金额+
“到期日:”+到期日+
''+
'';
}
}
//验证表单
函数validateForm(债务人名称、债务人金额、债务人到期日){
如果(!debtName | | |!debtAmount | |!debtDue){
警报(“请填写表格”);
返回false;
}
返回true;
}
//模态端
我创建了一个JSFIDLE,使调试代码变得更容易(并对其进行了修复)——
我注意到您的代码中有:
<input type="button" class="submitdebt" id="submitdebt" onclick="insert()" value="Submit"/>
我想您可能想在这里调用
saveDebt
。如果没有,因为您正在尝试处理表单提交事件,您应该将其创建为表单提交输入(type=“submit”
)并删除onclick处理程序,流的其余部分将按您的预期工作。这看起来与Java无关。请尝试找出您试图编写代码的语言的名称,并适当地标记您的问题。这是JavaScript,而不是Java。请更新您的问题::-)我刚刚试过你的代码,效果很好=)
var debtObject = {
name: debtName,
amount: debtAmount,
due: debtDue
}
// Test if debts is null
if(localStorage.getItem('debts') === null) {
// Init array
var debts = [];
// Add to array
debts.push(debtObject);
// Set to localStorage
localStorage.setItem('debts', JSON.stringify(debts));
} else {
// Get debts from localStorage
var debts = JSON.parse(localStorage.getItem('debts'));
// Add debt to array
debts.push(debtObject);
// Re-set back to localStorage
localStorage.setItem('debts', JSON.stringify(debts));
}
// Clear form
document.getElementById('myForm').reset();
// Re-fetch debts
fetchDebts();
// Prevent form from submitting
e.preventDefault();
}
// Fetch debts
function fetchDebts() {
// Get debts from localStorage
var debts = JSON.parse(localStorage.getItem('debts'));
// Get output id
var results = document.getElementById('results');
// Build output
results.innerHTML = '';
for( var i = 0; i < debts.length; i++) {
var name = debts[i].name;
var amount = debts[i].amount;
var due = debts[i].due;
results.innerHTML += '<div class="well">'+
'<p>' + 'Name: ' + name +
'Amount: ' + amount +
'Due: ' + due +
'</h3>'+
'</div>';
}
}
// Validate Form
function validateForm(debtName, debtAmount, debtDue) {
if(!debtName || !debtAmount || !debtDue) {
alert('Please fill in the form');
return false;
}
return true;
}
// modal end
<input type="button" class="submitdebt" id="submitdebt" onclick="insert()" value="Submit"/>