回答編集履歴
1
chousei
test
CHANGED
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@@ -115,3 +115,129 @@
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115
115
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</p>
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116
116
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117
117
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```
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118
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119
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120
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121
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# 分・秒の表示
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122
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123
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```javascript
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124
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125
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<script>
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126
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127
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var timerId;
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128
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129
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var defaultTime=0;
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130
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131
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window.addEventListener('DOMContentLoaded', ()=>{
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132
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133
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const start=document.querySelector("#start");
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134
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135
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const stop=document.querySelector("#stop");
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136
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137
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const reset=document.querySelector("#reset");
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138
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139
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const min=document.querySelector("#min");
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140
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141
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const sec=document.querySelector("#sec");
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142
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143
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const time=document.querySelector("#time");
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144
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145
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start.addEventListener('click',()=>{
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146
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147
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start.disabled=true;
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148
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149
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stop.disabled=false;
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150
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151
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reset.disabled=true;
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152
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153
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timerId= setInterval(countdown=()=>{
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154
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155
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var v=parseInt(time.value);
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156
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157
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v--;
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158
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159
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if(v<=0){
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160
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161
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clearInterval(timerId);
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162
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163
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stop.disabled=true;
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164
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165
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reset.disabled=false;
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166
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167
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}
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168
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169
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time.value=v;
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170
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171
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min.textContent=parseInt(v/60);
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172
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sec.textContent=v%60;
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174
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175
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return countdown;
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176
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177
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},1000);
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178
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179
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});
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180
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181
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stop.addEventListener('click',()=>{
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182
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183
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clearInterval(timerId);
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184
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185
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start.disabled=false;
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186
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187
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stop.disabled=true;
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188
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189
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reset.disabled=false;
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190
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191
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});
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193
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reset.addEventListener('click',()=>{
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194
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195
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start.disabled=false;
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196
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197
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reset.disabled=true;
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198
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199
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time.value=defaultTime;
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200
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201
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min.textContent=parseInt(defaultTime/60);
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202
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203
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sec.textContent=defaultTime%60;
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204
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205
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});
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206
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207
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time.addEventListener('input',()=>{
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208
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209
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min.textContent=parseInt(time.value/60);
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210
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211
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sec.textContent=parseInt(time.value)%60;
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212
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213
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defaultTime=parseInt(time.value);
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214
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215
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start.disabled=parseInt(time.value)<=0;
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216
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217
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});
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218
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219
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});
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220
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221
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</script>
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222
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223
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<p>
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224
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225
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<span id="min">0</span> 分
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226
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227
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<span id="sec">0</span> 秒
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228
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229
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</p>
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230
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231
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<p>
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232
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233
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<input type="button" id="start" value="START" disabled>
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234
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235
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<input type="button" id="stop" value="STOP" disabled>
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236
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237
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<input type="button" id="reset" value="RESET" disabled>
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238
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239
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<input type="number" id="time" min="0" max="180" value="0">
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240
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241
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</p>
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242
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243
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```
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