【发布时间】：2022-07-22 00:27:10
【问题描述】：
如何编辑代码，使function calculateTotal在提交按钮按下时可以运行，输出是提交按钮按下后的输出，但通过不断添加不直接显示给人们。
var person = [];
person["person1"]=1;
person["person2"]=2;
person["person3"]=3;
person["person4"]=4;
person["person5"]=5;
var elec = [];
elec["elecuse"] = 0;
elec["elec1"] = 100*(5455/12);
elec["elec2"] = 150*(5455/12);
elec["elec3"] = 200*(5455/12);
elec["elec4"] = 250*(5455/12);
elec["elec5"] = 300*(5455/12);
elec["elec6"] = 350*(5455/12);
elec["elec7"] = 400*(5455/12);
elec["elec8"] = 450*(5455/12);
elec["elec9"] = 500*(5455/12);
elec["elec10"] = 550*(5455/12);
elec["elec11"] = 600*(5455/12);
elec["elec12"] = 650*(5455/12);
elec["elec13"] = 700*(5455/12);
function getNumberperson()
{
var numberperson=0;
var theForm = document.forms["energyform"];
var selectedPerson = theForm.elements["selectedperson"];
for(var i = 0; i < selectedPerson.length; i++)
{
if(selectedPerson[i].checked)
{
numberperson = person[selectedPerson[i].value];
}
}
return numberperson;
}
function getElectotal()
{
var electotal=0;
var theForm = document.forms["energyform"];
var selectedElec = theForm.elements["electricity"];
electotal = elec[selectedElec.value];
return electotal;
}
function waste()
{
var mustwaste=0;
var theForm = document.forms["energyform"];
var waste = theForm.elements["waste"];
if(waste.checked==true)
{
mustwaste=(692/12);
}
return mustwaste;
}
function recyclealu()
{
var recyclealu=0;
var theForm = document.forms["energyform"];
var yesalu = theForm.elements["yesalu"];
if(yesalu.checked==true)
{
recyclealu=-89.38;
}
return recyclealu;
}
function recycleplas()
{
var recycleplas=0;
var theForm = document.forms["energyform"];
var yesplas = theForm.elements["yesplas"];
if(yesplas.checked==true)
{
recycleplas=-35.56;
}
return recycleplas;
}
function checkAllRecycles() {
const recycleBoxes = document.querySelectorAll('.recycle');
if (recycleBoxes) {
recycleBoxes.forEach((recycleBox) => {
if (!recycleBox.checked) {
recycleBox.checked = 'checked';
}
})
}
calculateTotal();
}
function calculateTotal()
{
var totalco = getNumberperson()*getElectotal() + waste() + recyclealu() + recycleplas();
//display the result
document.getElementById('totalConsumption').innerHTML = +totalco.toFixed(2);
}
//add a function to hide the result on page loading at the start
function hideTotal()
{
document.getElementById('totalConsumption').innerHTML = "0";
}
function vwaste()
{
var cw = document.getElementsByName('waste');
for (var i = 0; i < cw.length; i++)
{
if (cw[i].type == 'checkbox')
{
if (cw[i].checked) {return true}
}
}
return false;
}
function allvalidate()
{
var error = document.getElementById("error")
if (!vwaste())
{
// Changing content and color of content
error.textContent = "Waste must be select"
error.style.color = "red"
return false;
}
return true;
}<body onload='hideTotal()'>
<div id="all">
<form action="/action_page.php" id="energyform" onsubmit="return false;">
<div>
<div class="cont_order">
<fieldset>
<legend>Carbon Footprint Calculator</legend>
<label >Number of Person Live in Household</label><br/>
<label class='radiolabel'><input type="radio" name="selectedperson" value="person1" onclick="calculateTotal()" />1 </label>
<label class='radiolabel'><input type="radio" name="selectedperson" value="person2" onclick="calculateTotal()" />2 </label>
<label class='radiolabel'><input type="radio" name="selectedperson" value="person3" onclick="calculateTotal()" />3 </label>
<label class='radiolabel'><input type="radio" name="selectedperson" value="person4" onclick="calculateTotal()" />4 </label>
<label class='radiolabel'><input type="radio" name="selectedperson" value="person5" onclick="calculateTotal()" />5 </label>
<br/>
<label><i class="fa fa-flash"></i>Waste</label>
<input type="checkbox" id="waste" name='waste' onclick="calculateTotal()" /><span id="error"></span>
<hr><label><i class="fa fa-flash"></i>Energy Consumption Per Month</label></hr>
<br/>
<label> Electricity    </label>
<select id="electricity" name='electricity' onchange="calculateTotal()">
<option value="elecuse">0kWh</option>
<option value="elec1">100kWh</option>
<option value="elec2">150kWh</option>
<option value="elec3">200kWh</option>
<option value="elec4">250kWh</option>
<option value="elec5">300kWh</option>
<option value="elec6">350kWh (Avg US)</option>
<option value="elec7">400kWh (Avg MY)</option>
<option value="elec8">450kWh</option>
<option value="elec9">500kWh (Avg AS)</option>
<option value="elec10">550kWh</option>
<option value="elec11">600kWh</option>
<option value="elec12">650kWh</option>
<option value="elec13">700kWh</option>
</select>
<hr><label><i class="fa fa-flash"></i>Recycle </label></hr>
<br/>
<label for='yesalu' class="alu"> Aluminium and Steel  </label>
<input type="checkbox" id="yesalu" name='yesalu' class="recycle" onclick="calculateTotal()" />
<br/>
<label for='yesplas' class="plas"> Plastic                          </label>
<input type="checkbox" id="yesplas" name='yesplas' class="recycle" onclick="calculateTotal()" />
<br/>
<button type="button" onclick="checkAllRecycles()">Select All</button>
<br/>
<p>Total CO2 produced per year per household:</p>
<div id="totalConsumption">0</div>
<label>pounds</label>
<div>US Household average is 21,820 lbs per year.</div>
</fieldset>
</div>
<input type='submit' id='submit' value='Submit' onclick="allvalidate()" />
<input type='reset' id='reset' value='Reset' onclick="hideTotal()" />
</div>
</form>
</div>
</body>【问题讨论】：
-
为什么不在form上使用
addEventListener("submit")方法？
标签： javascript html forms