Dart- move html element

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原作者: [db:作者] 来自: [db:来源] 收藏邀请

今天给出一个例程，像是个小游戏！哈哈

一 html

//anagram.html

<!DOCTYPE HTML>

<html>
<head>
<title>Anagram</title>
</head>
<body>
<h3>Pile:</h3>
<div id="letterpile"></div>

<h3>Word:</h3>
<div id="result"></div>
<div>
<input id="newl" type="button" value="new letters">
</div>
<script type="application/dart" src="anagram.dart"></script>
</body>
</html>

//anagramjs.html

<!DOCTYPE HTML>

二 dart

//anagram.dart

import 'dart:html';
import 'dart:math' show Random;

List<String> alphabet = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n"];

List<ButtonElement> buttons = new List();
DivElement letterpile;
DivElement result;

void main() {
letterpile = querySelector('#letterpile');
result = querySelector('#result');
querySelector('#newl').onClick.listen(generateNewLetters);
}

void generateNewLetters(Event e) {
letterpile.children.clear();
result.children.clear();
Random indexGernerator = new Random();
buttons.clear();
for(var i=0; i<6; i++) {
int letterIndex = indexGernerator.nextInt(alphabet.length);
buttons.add(new ButtonElement());
buttons[i].classes.add("letter");
buttons[i].onClick.listen(moveLetter);
buttons[i].text = alphabet[letterIndex%14];
letterpile.children.add(buttons[i]);
}
}

void moveLetter(Event e) {
Element letter = e.target;
if (letter.parent==letterpile) {
result.children.add(letter);
} else {
letterpile.children.add(letter);
}
}

三 anagram.js

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break
case"add-ondone":z.c7(y.h(x,1),y.h(x,2))
break
case"remove-ondone":z.cD(y.h(x,1))
break
case"set-errors-fatal":z.bx(y.h(x,1),y.h(x,2))
break
case"ping":z.cm(y.h(x,1),y.h(x,2),y.h(x,3))
break
case"kill":z.cl(y.h(x,1),y.h(x,2))
break
case"getErrors":y=y.h(x,1)
z.dx.w(0,y)
break
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z.dx.U(0,y)
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eT:{"^":"i:0;a,b",
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br:{"^":"cp;b,c,a",
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z=P.a8(["command","message","port",this,"msg",a])
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if(typeof z!=="number")return z.by()
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if(typeof y!=="number")return y.by()
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bK:function(a){if(this.c)return
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e5:{"^":"b;a,b,c",
bF:function(a,b){var z,y
if(a===0)z=self.setTimeout==null||init.globalState.x===!0
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if(z){this.c=1
z=init.globalState.f
y=init.globalState.d
z.a.D(new H.ax(y,new H.e7(this,b),"timer"))
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return z}}},
e7:{"^":"i:1;a,b",
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this.b.$0()}},
e8:{"^":"i:1;a,b",
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T:{"^":"b;ak:a<",
gt:function(a){var z=this.a
if(typeof z!=="number")return z.cL()
z=C.f.aY(z,0)^C.f.N(z,4294967296)
z=(~z>>>0)+(z<<15>>>0)&4294967295
z=((z^z>>>12)>>>0)*5&4294967295
z=((z^z>>>4)>>>0)*2057&4294967295
return(z^z>>>16)>>>0},
p:function(a,b){var z,y
if(b==null)return!1
if(b===this)return!0
if(b instanceof H.T){z=this.a
y=b.a
return z==null?y==null:z===y}return!1}},
X:{"^":"b;a,b",
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if(a==null||typeof a==="string"||typeof a==="number"||typeof a==="boolean")return a
z=this.b
y=z.h(0,a)
if(y!=null)return["ref",y]
z.n(0,a,z.gj(z))
z=J.n(a)
if(!!z.$isbY)return["buffer",a]
if(!!z.$isbd)return["typed",a]
if(!!z.$isr)return this.bt(a)
if(!!z.$isds){x=this.gbq()
w=a.gba()
w=H.aM(w,x,H.q(w,"C",0),null)
w=P.aK(w,!0,H.q(w,"C",0))
z=z.gbm(a)
z=H.aM(z,x,H.q(z,"C",0),null)
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if(!!z.$isc)this.bl(a)
if(!!z.$isdT)this.Y(a,"RawReceivePorts can't be transmitted:")
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if(!!z.$isbr)return this.bw(a)
if(!!z.$isi){v=a.$static_name
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bl:function(a){return this.Y(a,null)},
bt:function(a){var z=this.br(a)
if(!!a.fixed$length)return["fixed",z]
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if(a.constructor===Array)return["const",z]
this.Y(a,"Can't serialize indexable: ")},
br:function(a){var z,y,x
z=[]
C.b.sj(z,a.length)
for(y=0;y<a.length;++y){x=this.A(a[y])
if(y>=z.length)return H.h(z,y)
z[y]=x}return z},
bs:function(a){var z
for(z=0;z<a.length;++z)C.b.n(a,z,this.A(a[z]))
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bu:function(a){var z,y,x,w
if(!!a.constructor&&a.constructor!==Object)this.Y(a,"Only plain JS Objects are supported:")
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y=[]
C.b.sj(y,z.length)
for(x=0;x<z.length;++x){w=this.A(a[z[x]])
if(x>=y.length)return H.h(y,x)
y[x]=w}return["js-object",z,y]},
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