我是javascript初学者,并尝试执行一些if-else语句。基本上你可以在第二行看到我自己的代码!直到第七行。但dreamwaever总是把它标记为红色!那么我做错了什么
this.toDataURL = function() {
if this.path == []
{
document.getElementById("canvascontent").value = "Oh yeah";
}
else
{
var canvas = document.createElement("canvas");
var ctx = canvas.getContext("2d");
canvas.width = innerWidth;
canvas.height = innerHeight;
ctx.drawImage(layer0, 0, 0);
ctx.drawImage(layer1, 0, 0);
ctx.drawImage(layer2, 0, 0);
var url = canvas.toDataURL('image/png');
document.getElementById("canvascontent").value = url;
}
};
您在if
语句中忘记了()
:
if (this.path == []) {
您忘记用括号代替if
语句:
if (this.path == []) {
if (this.path == []) //You missed to enclose if statement.
通常
if ( statement ) {
}
else {
}
您忘记了()括号
if (this.path == []) {